Sbc intake torque specs aluminum heads

Here is one source: Standard operating procedure with a small block Chevy and aluminum heads and production bolts is to use hardened steel flat washers under the heads of the bolts, coat the threads with waterproof goop and torque bolts to 65 ft/lbs. I usually go 35, then 50, then 65. The Techinspector has you covered.

Small Block Chevy Head Bolt Torque Specifications. Step 1 25 Ft/Lbs. Step 2 45 Ft/Lbs. Step 3 65 Ft/Lbs. For Head Studs or aftermarket bolts CHECK YOUR INSTRUCTIONS, SBC studs are available in a ton of. different styles depending on heads and stud diameters. Some People do only 1 or 2 steps to reach the final torque. Option 2: AFR's 227cc "Race Ready" and "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. This head features 60/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag …Original Small Block. While the first generation 350's 65 ft.-lb. head bolt torque is one of those numbers that all real gearheads have committed to memory, the bolt tightening sequence is a little more complex. Assign each of the three rows of bolts a letter from top (intake manifold side) to bottom (exhaust manifold side); "A" for the top, "B ...25 lb/ft for the intake > Edelbrock Alum Heads. 110 lb/ft for the top row of head bolts , 100 lb/ft for the bottom row (closest to the spark plugs) These are specs for a 390 FE. Just did this setup. Also depends on if you are using studs or ARP bolts, or the original head bolts.. Check the install sheet that came with the heads. Save Share. Like.Tapered Seat Plugs. Step One. Install the new plug finger tight, and complete the installation with a torque wrench. Note: If using a torque wrench vs. plug wrench, please refer to the Torque Recommendations chart below. Step Two. Turn Finger Tight. A tapered seat plug does not use gaskets and requires one-sixteenth (1/16) turn.E. ericnova72. 22557 posts · Joined 2007. #3 · Aug 1, 2015. Spec for the SBC is 65-70 ft.lbs with factory bolts.....75 ft.lbs isn't going to hurt anything....but if you want to re-torque, it is a good idea, you will find that the gasket has relaxed some under the compressive force of the head, and you will find some bolts seem looser, usually ...

The specs listed are for stock fasteners. If you use ARP or other aftermarket fasteners, follow the instructions that came with your new hardware. Related Products: Camshafts & Valvetrain, Cylinder Heads, Engine Assemblies, Oiling Systems, Other Engines & Components, Pistons & Piston Rings, Valve Covers & Dress-Up Kitsaluminum manifold, aluminum heads, bolt torque. Jump to Latest Follow. 38K views 8 replies 6 participants last post by 1BAD80 Nov 7, 2004. W. william27103 Discussion starter. 137 posts · Joined 2004. #1 · Nov 6, 2004. I can't find the torque specs for an aluminum intake manifold on aluminum cylinderheads anywhere. Can any of you guys help me?After the intake is seated for some time, maybe an hour or so, go back and re-torque to 30 ft lbs one more time. This is for factory aluminium Chev BB intakes. If you are using an aftermarket aluminum intake refer to the mfg torque specs. My Showroom. 69' SS396 Chevelle L78 396/375hp M-21 Close Ratio Cortez Silver.Big Block Chevy Manifold. Your Price: $ 645.39 SKU 41114000. Dart Big Block Chevy Manifolds. -. Add to cart. Compare.To find torque specs for new Ford vehicles, visit Ford.com, and find the specific vehicle. To find torque specs for older Ford models, browse Edmunds.com, and select a specific For...Intake manifold bolts and head studs/bolts have to be torqued in a certain pattern and to a certain torque spec in order for your engine to work properly. Intake manifold bolts on SBC engines should be torqued to 30 lb-ft in a two-step sequence.BP AK 275. BP AK 285. BD Series Cylinder Heads/12°/13.5°. WP BD 2000. WP BD 2300. WP BD 1010. BRODIX is serious about quality and workmanship at every step of the process. Small Block Chevy Compatible aluminum Cylinder Heads SBC.Our 1402 and 1472 cylinder heads are machined for 7/16" head bolt diameters; all others are machined for 1/2" head bolts. When using heads with 1/2" holes on blocks with 7/16" threads, we recommend using ARP's 254-3708 or 254-4401 kit with their 200-8598 bushings. If you are using ARP hardware, follow their recommended torque specifications.

Kohler engines are known for their reliability and performance. Whether you are using a Kohler engine in your lawn mower, generator, or other equipment, ensuring that the torque sp...Oct 6, 2015 · As for the torque specifications, the 289 (above top) and 302 intakes are both torqued in two stages to between 20 and22 lb-ft. The 351 intake, on the other hand is torqued in three stages to between 23 and 25 lb-ft. Ford Head Bolt Torque Sentences and Specs. The torque sequence for all three Ford engines can be seen in the photo above. Capable of supporting over 500 horsepower, This intake is A perfect match for BluePrint Aluminum H8002K and HP8103 headed engines, or iron Vortec headed engines. We even include the bolts and gaskets in this convenient kit! Engine Block Style: SBC Stock/OEM standard deck. Cylinder Head Style: Vortec. Carburetor Mounting: 4-barrel square bore.21 Jul 2020 ... ... torque specs and make sure you follow the specified patterns. Thanks for watching! Get Your Set of Edelbrock Aluminum Heads Here: https ...

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Heads are not drilled for steam holes that are required on SBC 400 engines. Recommend head gasket for 4” bore engines is the Fel-Pro 1003 style gasket. Head bolts such as 50542171 and washers 50542102 are recommended. Torque to 50-65-80 ft.-lbs., with 75 ft.lbs. torque on the bottom. Use Permatex 80631 style sealant on the threads.Advertisement As the piston finally bottoms out, the intake port is uncovered. The piston's movement has pressurized the mixture in the crankcase, so it rushes into the cylinder, d...Despite the LT1’s engineering shortcomings up front, it was a terrific factory small block sporting a nodular iron crank, powdered metal “cracked” connecting rods, and hypereutectic pistons. In 1992, the LT1 yielded 300 hp. By the end of production in 1997, it was making 330 factory ponies in the powerful LT4.Three things matter the most regarding SBC heads - quality, price, and performance. The FloTek 180cc aluminum alloy casting cylinder heads are the answer. Featuring 180 cc ports with a unique design made for versatility, the FloTek SBC head is one of the best SBC heads for low-end torque. Specialized Department.18123 posts · Joined 2002. #4 · Dec 30, 2010. it is NOT the same specs as a regular small block chevy. if you try to torque the correct flanged vortec intake bolts to 30 lb ft, you will wind up snapping the bolts. i believe the proper spec is something like 15 lb ft, but i just used my short 3/8" ratchet and snugged them down on my Nova and ...

Apply oil or suitable thread lubricant to head bolt threads and under side of bolt heads and washers. Torque to 95 ft./lbs. in three steps (45-65-95) following the factory tightening …ProMaxx Performance 185cc Aluminum Cylinder Heads Small Block Chevy. 185cc Aluminum Cylinder Heads. Small Block Chevy. 2.02''/1.60'' Valves. 185cc Intake Runner. 72cc Combustion Chamber. Straight Plug. Assembled. Sold as pairs.25 Jul 2013 ... Re-torque cylinder head ... Engine Building Part 12 - Installing an Edelbrock Performer Dual Plane Intake Manifold SBC 350 ... 5.3 Head Install and ...The LQ4 is a 6.0L LS (Gen. 3) small block engine used in GM trucks between 1999 and 2007. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for the stock LQ4 engine. Mechanically similar, General Motors’ LS and LS-based Vortec engines wound up on almost every branch of the GM family ...This is on a small block Chevrolet. I know Socket head cap screws will only fit in some places, because the Diameter of the cap screw head is too large and a 3/8 nut is larger ! 69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau ...Option 2: Our 235cc "Competition" heads come with 100% CNC machined intake runners, exhaust ports and combustion chambers. Equipped with Titanium retainers and high quality components, featuring a 60/40 valve spacing which requires shaft mounted rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag ...Bottom line: Changing just the carb, intake, and cam nets a 21.5-lb-ft, 55hp gain over the ZZ4's baseline configuration. These are easy bolt-ons well within the capability of the average hot ...Capable of supporting over 500 horsepower, This intake is A perfect match for BluePrint Aluminum H8002K and HP8103 headed engines, or iron Vortec headed engines. We even include the bolts and gaskets in this convenient kit! Engine Block Style: SBC Stock/OEM standard deck. Cylinder Head Style: Vortec. Carburetor Mounting: 4-barrel square bore.GM 350 Intake Manifold Bolts Torque Specifications. by Anne Davis. The 350 is a member of Chevrolet's small block engine family. First built in 1967, this 5.7-liter engine is featured in such vehicles as the Chevrolet Camaro and Nova. Throughout its life, the 350 has had numerous models identified by letter combinations such as L-48 and LT-1.Heads are not drilled for steam holes that are required on SBC 400 engines. Recommend head gasket for 4” bore engines is the Fel-Pro 1003 style gasket. Head bolts such as 50542171 and washers 50542102 are recommended. Torque to 50-65-80 ft.-lbs., with 75 ft.lbs. torque on the bottom. Use Permatex 80631 style sealant on the threads.

This is on a small block Chevrolet. I know Socket head cap screws will only fit in some places, because the Diameter of the cap screw head is too large and a 3/8 nut is larger ! 69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau ...

Small Block Chevrolet Torque Specs. Views: The following specs apply to: Gen. I, Small Block Chevy. Notes. These specs are for stock-type bolts with light engine oil applied to …Object moved to here.Oct 6, 2015 · As for the torque specifications, the 289 (above top) and 302 intakes are both torqued in two stages to between 20 and22 lb-ft. The 351 intake, on the other hand is torqued in three stages to between 23 and 25 lb-ft. Ford Head Bolt Torque Sentences and Specs. The torque sequence for all three Ford engines can be seen in the photo above. Torque specifications vary depending on the fastener brand, lubricants, and other factors. Head bolt torque sequence, however, generally remains constant for a given engine. To give you a quick reference of torque sequences, OnAllCylinders’ Lori Sams has created a series of infographics for different engine makes. Performer RPM #60619, 60639, 60719, 60739, 60889, 60899, 60949, and 60999: Cylinder Heads are designed for use on 1986 & earlier 302, 327, 350, and 400 c.i.d. Chevrolet engines (not centerbolt). NOTE: See “Specifications” section of this instruction sheet for additional cylinder head details such as spark plug position (straight or angled ... Can you paint aluminum siding? Yes, you can! However, you should find out what you need to know before starting. Expert Advice On Improving Your Home Videos Latest View All Guides ...

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May 1, 2023 · On the plus side, the Vortec intake port flows 42 cfm better than the stock heads at 0.500-inch lift and 18 cfm better on the exhaust side. Vortec Iron, Scoggin-Dickey Modified PN SD8060A2, $779. ... What is the torque specification for an aluminum intake manifold with aluminum cylinder heads on a SBC 350 (ZZ4)? Most of the spec's I'm running across …The specifications given are for the typical 350 engine. The Chevrolet 350 cylinder-head torque specification is 65 ft.-lbs. The intake installed onto cast-iron heads requires 30 ft.-lbs. If your engine has aluminum cylinder heads, the threads are more fragile than the cast iron, so the intake specification is 18 ft.-lbs.Starter: Standard SBC Stud holes, Head: Blind holes Timing chain/gears Standard SBC components, with 91-02 vortec thrust plate Timing Cover: Can use stock cover or late model vortec cover will work. Torque Specs: #1-#5 7/16” bolts – 65 ft lbs w/CMD #3 #2, #3, #4 3/8” bolts – 35 ft lbs w/CMD #3Cylinder Head, Performer RPM, Aluminum, Assembled, 64cc Chamber, 195cc Intake Runner, Chevy 302, 327, 350, 400, Each. Part Number: EDL-60899 5.0 out of 5 stars435-3603. Chevrolet Big Block Mark IV block with Late Bowtie aluminum, Iron Dart, Pro-1, Pro Top Line, & World Products iron heads, 12pt, ARP Stainless. Head Bolt Kit.The specifications given are for the typical 350 engine. The Chevrolet 350 cylinder-head torque specification is 65 ft.-lbs. The intake installed onto cast-iron heads requires 30 ft.-lbs. If your engine has aluminum cylinder heads, the threads are more fragile than the cast iron, so the intake specification is 18 ft.-lbs.Chevrolet Performance Fast Burn Bare Aluminum Cylinder Head, Small Block Chevy. Fast Burn Bare Aluminum Cylinder Head. Small Block Chevy. 210cc Intake Ports. 62cc Combustion Chambers. Valves: 2.000 in. Intake/1.550 in. Exhaust. Sold Individually. View Details. $887.46.Apr 20, 2017 · If in doubt and if you're using an Edelbrock aluminum intake and heads for example then call their 1-800 number to get the right on the money answer. Some manufactures may specify a different torque value for their products,better to know for sure instead of taking a chance and the messing up the threads. :anim_25: :shakehands: 3. To ensure proper thread engagement and accurate torque readings, clean ALL threads in the block. Chase if necessary with ARP Thread Chaser, part number 911-0004 (7/16-14). 4. Install the cylinder head(s) and check for binding or misalignment. 5. Position the chamfered side of the washer on the bolt so it faces the bolt head. ….

Intake Manifold Bolts (Cast Iron Head) 25 ft.-lbs. Oil Pump Bolt: 65 ft.-lbs. Cam Sprocket Bolts: 20 ft.-lbs. Harmonic Damper Bolt: 85 ft.-lbs. Flywheel/Flexplate Bolts: ... you should follow the recommended torque specifications. Related Products: Camshafts & Valvetrain, Cylinder Heads, Engine Assemblies, Intake Manifolds, Other Engines ...Torque specs. 04-30-2013, 05:23 PM. I have a 351W with the performer RPM heads and Pro-Flo Intake. I need to re-torque the heads but don't have the specs for sequence or ft pounds, and since the heads are aluminum, do I need to use stretch head bolts if I replace them? Any help would be appreciated, Thanks!After the intake is seated for some time, maybe an hour or so, go back and re-torque to 30 ft lbs one more time. This is for factory aluminium Chev BB intakes. If you are using an aftermarket aluminum intake refer to the mfg torque specs. My Showroom. 69' SS396 Chevelle L78 396/375hp M-21 Close Ratio Cortez Silver.289, 302, 351W, Assembled Cylinder Head Style, Aluminum. Features hardened locks and retainers. Head is compatible with most roller camshafts. Includes high-temp exhaust seats and bronze guides. Made from lightweight, yet strong aluminum with a natural finish. Intake valve diameter measures 1.940" and the exhaust valve diameter measures 1.540".These heads also have as-cast ports and maintain the stock exhaust port location making them compatible with OEM headers and hardware. E-Series cylinder heads are available for small-block Chevy and small-block Ford. FEATURES INCLUDE: High-Performance Street Applications; Large Runners and Revised Exhaust Ports; Ideal For Larger Displacement ...A nearly complete or dressed engine, which includes the addition of an aluminum intake manifold, carburetor, distributor, aluminum water pump, harmonic balancer/damper, spark plugs, spark plug wires, fuel pump, and fuel line, weighs just over 550 lbs. (around 500 lbs. with aluminum cylinder heads).aluminum manifold, aluminum heads, bolt torque. Jump to Latest Follow. 38K views 8 replies 6 participants last post by 1BAD80 Nov 7, 2004. W. william27103 …2 – 1/2-14 NPT Pipe Plugs. 1 – 3/8-18 NPT Pipe Plug. DESCRIPTION: The Edelbrock RPM Air-Gap #7116 intake manifold has been designed for 262-400 c.i.d. small-block Chevy engines equipped with Vortec style (L31) cylinder heads. The manifold accepts late model water neck, air conditioning, alternator and H.E.I. ignition systems.You might still say "tin foil," but chances are you're using aluminum. We recently posted about the many ways aluminum foil is helpful around the house and quickly found that menti... Sold as a pair. Uses 3/4 in. reach gasket seat spark plug. Heads are drilled to accept both early style (12 bolt) and late style (8 bolt/Vortec) intake manifolds. Exhaust ports are 1/2 in. raised compared to stock cylinder heads. Welcome to a new class of high performance cylinder heads--BluePrint Muscle Series! Sbc intake torque specs aluminum heads, The AFR SBC heads in 220cc Eliminator Race configuration have multiple advantages. The first is the flow rate, which is ideal for 350-427 cubic inch small blocks, capable of supporting up to 700 HP and operating between 4,000 and 8,000 RPMs, while keeping standard valvetrain components. A second benefit is weight savings over cast iron heads ..., Big Block Chevy Intake Bolt Torque Specifications. 25 Ft/Lbs – Aluminum Heads 35 Ft/Lbs – Iron Heads. The torque spec can be anywhere from 25-35 on Iron heads, but for aluminum I tend to go towards the lower side. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good shape., • Torque Heads: 70 ft-lb • Torque Rocker Studs: 40-45 ft-lb • Intake Gaskets: BRODIX MG 1600 (Trim to Fit) MR. GASKET 143 • Head Gaskets: 350 - FEL-PRO 1003, COMETIC C5399 400 - FEL-PRO 1004, COMETIC C5403 • Exhaust Gaskets: FEL-PRO 1407 • Head Studs: SK HSSB 13 (Aluminum Block) BRHS 13 STD CI (Cast Iron) • Accessory Bolt Holes ..., Here is one source: Standard operating procedure with a small block Chevy and aluminum heads and production bolts is to use hardened steel flat washers under the heads of the bolts, coat the threads with waterproof goop and torque bolts to 65 ft/lbs. I usually go 35, then 50, then 65. The Techinspector has you covered., CNC-machined aluminum performance cylinder head; Completely assembled with 2.000"/1.550" valves; 210-cc intake port, roof raised .240" 78-cc D-shaped exhaust ports, raised .200" – requires Fel-Pro exhaust gasket P/N 1470 (may require minor trimming) 62-cc combustion chamber, .400" deck (can be milled up to .060") No heat riser, Big Block Chevy Intake Bolt Torque Specifications. 25 Ft/Lbs - Aluminum Heads. 35 Ft/Lbs - Iron Heads. The torque spec can be anywhere from 25-35 on Iron heads, but for aluminum I tend to go towards the lower side. IF you do have a spec from the manufacturer follow that. Make sure threads in the head are clean and in good., The specifications given are for the typical 350 engine. The Chevrolet 350 cylinder-head torque specification is 65 ft.-lbs. The intake installed onto cast-iron heads requires 30 ft.-lbs. If your engine has aluminum cylinder heads, the threads are more fragile than the cast iron, so the intake specification is 18 ft.-lbs., Small Block Chevy Intake Manifold Bolt Torque Specifications. 25 Ft/Lbs. Make sure you follow the sequence in a couple of steps, worry about this more on old and aluminum manifolds. Cast Iron is much more forgiving if you are unfortunate to have to use a boat anchor of an intake. , Intake Manifold, Vortec Head Design. Designed for 283-400-cubic-inch engines using Vortec cylinder heads P/N 12558060, P/N 19300956, P/N 19300955, P/N 19331470, or P/N 19331472. Has 4-bolts per side to attach it to these cylinder heads. Aluminum high-rise design maximizes horsepower and delivers a broad torque curve., INSTALLATION INSTRUCTIONS. Use either Edelbrock #7201 or Fel-Pro #1256 (#1205 for aftermarket heads) intake gasket set when installing this intake manifold. Fully clean the cylinder head intake flanges and the engine block end seal surfaces. Apply Edelbrock Gasgacinch sealant PN 9300 to both cylinder head flanges and to the cylinder head side ..., Mar 21, 2002 · Various aluminum head vendors recommend 70 ft/lbs on bolts or studs. In the Corvette service manual, Chevrolet recommends different torque for the short, medium and long bolts. I tend to trust ARP, but 80 ft/lbs sounds sounds like a LOT of torque to apply to aluminum heads. The guy at ARP said that if you use their moly thread lube, you can ... , Our 1402 and 1472 cylinder heads are machined for 7/16" head bolt diameters; all others are machined for 1/2" head bolts. When using heads with 1/2" holes on blocks with 7/16" threads, we recommend using ARP's 254-3708 or 254-4401 kit with their 200-8598 bushings. If you are using ARP hardware, follow their recommended torque specifications. , ALUMINUM CYLINDER HEADS: These heads deliver significant gains in both power and torque for all Small Block Chevrolet applications – right out of the box. Pro Action™ SBC Aluminum Cylinder Heads are the perfect choice for a variety of performance engines, including street rod, muscle car, oval track and drag racing applications., On the plus side, the Vortec intake port flows 42 cfm better than the stock heads at 0.500-inch lift and 18 cfm better on the exhaust side. Vortec Iron, Scoggin-Dickey Modified PN SD8060A2, $779. ..., #1 · May 26, 2004. I'm now going to install my manifold and then headers onto my (pro topline) aluminum heads. I'm using ARP bolts for the manifold, and ARP studs for the …, Small Block Chevy Intake Manifold Bolt Torque Specifications. 25 Ft/Lbs. Make sure you follow the sequence in a couple of steps, worry about this more on old and aluminum manifolds. Cast Iron is much more forgiving if …, Full-CNC. Speedmaster™ CNC ported cylinder heads are machined on dedicated 4-axis and 5-axis CNC machining centers to ensure accuracy and cost effectiveness. Combustion Chamber, Exhaust and Intake Ports all fully CNC machined for better flow. CNC combustion chambers offer superior control over flame travel and quench area., Automotive Racing Products 1863 Eastman Avenue Ventura, Ca 93003. Tel: (805) 339-2200 Fax: (805) 650-0742 www.arp-bolts.com. INSTALLATION METHOD FOR PRO SERIES ROCKER ARM STUD KITS. Part Number: 235-7202 Application: 7/16 Dia. BB Chevy w/ Dart Aluminum Heads., Received 2 Likes on 2 Posts. Re: ZZ4 head bolt pattern and torque specs (Paul 73 Coupe) The torque sequence is the same as any small block. Start at the center between the two exhaust valves and work out from here. 65# of torque will work fine. Be sure to use lube on the underside of the bolt head and to use sealer on the threads., If using Fel-Pro Print-O-Seal, or any silicone beaded gasket, you must apply a small strip of silicone to both the deck flange of the cylinder head, Part #5023, 5025 Rev. 6/20/12 - QT/mc. Page 1 of 2. ©2012 Edelbrock LLC Brochure #63-5023. as shown in Figure 1 on the next page, and the at same location on the surface of the block to prevent ... , Posted 05/31/18 by OnAllCylinders Staff. Last updated on 12/29/2021. The L92 is a 6.2L, Gen. 4, small block engine used in GM luxury trucks and SUVs between 2007 and 2008. For marketing purposes, it was also known as the Vortec 6200. The information listed here is for a stock L92 engine. Mechanically similar, General Motors’ LS and LS-based ..., E. ericnova72. 22557 posts · Joined 2007. #3 · Aug 1, 2015. Spec for the SBC is 65-70 ft.lbs with factory bolts.....75 ft.lbs isn't going to hurt anything....but if you want to re-torque, it is a good idea, you will find that the gasket has relaxed some under the compressive force of the head, and you will find some bolts seem looser, usually ..., Various aluminum head vendors recommend 70 ft/lbs on bolts or studs. In the Corvette service manual, Chevrolet recommends different torque for the short, medium and long bolts. I tend to trust ARP, but 80 ft/lbs sounds sounds like a LOT of torque to apply to aluminum heads. The guy at ARP said that if you use their moly thread lube, you can ..., Sep 15, 2010 · bcm66. 4762 posts · Joined 2006. #7 · Sep 15, 2010. I have never used a torque wrench on aluminum intake bolts. Always went with the old timer rule of "get 'em tight - but not too tight". Then check them again after the engine has gone through a couple of heat cycles. 1968 Camaro SS 396 coupe L78 - now old school 468 big block. , Performer RPM #60619, 60639, 60719, 60739, 60889, 60899, 60949, and 60999: Cylinder Heads are designed for use on 1986 & earlier 302, 327, 350, and 400 c.i.d. Chevrolet engines (not centerbolt). NOTE: See “Specifications” section of this instruction sheet for additional cylinder head details such as spark plug position (straight or angled ..., Sold as a pair. Uses 3/4 in. reach gasket seat spark plug. Heads are drilled to accept both early style (12 bolt) and late style (8 bolt/Vortec) intake manifolds. Exhaust ports are 1/2 in. raised compared to stock cylinder heads. Welcome to a new class of high performance cylinder heads--BluePrint Muscle Series! , Feb 16, 2014 · The GM torque spec is for steel bolts going into steel heads. If you have aluminum heads, you should be applying the bolt torque specified by the manufacture of the heads. Bolt torque into aluminum is usually something in the range of 1/2 to 2/3 of the torque applied by the same bolt into steel. , It will crack! (Dont ask how I know). If I remember correctly it was 11 ft-lbs. Most torque wrenches dont go that low, so I just white knuckle them and consider it good. Will Stewart. '71 Malibu, 383 ci, Vortec heads 280H cam, TH400/2400 stall converter and 10 bolt/3.73 gear and Eaton posi. Save Share., Best Torque for Intake to Aluminum Head Bolts? Like title asks. Heads: AFR 190's Intake: L98 big mouth. Reply Like. 02-23-2004, 02:53 PM. # 2. GRX. Le …, Received 18 Likes on 15 Posts. Re: Best Torque for Intake to Aluminum Head Bolts? (GRX) I use 35# with my aluminum heads. Let them sit for a while then re-torque them since the gasket will take a set and the torque will fall off. Occasionally I have to do this a few times until the torque holds. Jake., bcm66. 4762 posts · Joined 2006. #7 · Sep 15, 2010. I have never used a torque wrench on aluminum intake bolts. Always went with the old timer rule of "get 'em tight - but not too tight". Then check them again after the engine has gone through a couple of heat cycles. 1968 Camaro SS 396 coupe L78 - now old school 468 big block., To find out a wheel torque spec, check the vehicle’s manual, industry reference guide or the shop repair manual. Vehicle dealers can also provide an appropriate wheel torque spec. ..., We've all been told not to put aluminum foil in the microwave. 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