Vortec 454 exhaust manifolds This can result in increased horsepower, torque, and even fuel efficiency. Thanks everyone. heads Water Nerck (thermostat) 20 foot-pounds (anti-sieze) exhaust manifold: 20 foot pounds (anti-sieze) bell housing 30 foot pounds water pump inlets, 30 foot pounds (anti-sieze) cylinder head: long bolt, 75 foot pounds, waterproof sealant (I use pipe thread dope) Dec 4, 2011 · zookpr, Thanks for the info. Big Block Exhaust Manifold Gasket. Kurt 2nd pic--- that's your secondary a. 4. Part Number: RNB-674-268. 3/305/350 engines. 4L/454 Exhaust Manifolds V8 Engine Type and get Free Shipping on Orders Over $109 at Summit Racing! Oct 7, 2009 · Intake Manifold: 25 foot pounds, use oil or anti-sieze on Al. it probably melted as the metal line that is missing the coupler is coming right from the exhaust manifold so it's getting hit with hot exhaust that right there (both issues) cam cause a huge case of being Jan 17, 2024 · Headers: Replacing a 454’s stock exhaust manifold with aftermarket headers can help the engine breathe better. Mar 22, 2007 · Small block vortec heads are drilled different tbi style heads for the intake manifold. I will hit the flange studs and nuts with PB Blaster, I suspect if there is going to be en issue, it will be there. 12556596 gets you the part that screws into the drivers side exhaust manifold for EGR feed. Several months pass and it begins to leak and of course they denied it when I confronted them about it. i. 4L), w/AIR, L. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Shop Chevy 454 Headers and Exhaust Manifolds and get Free Shipping on orders over $175 at Speedway Motors. Jun 15, 2023 · How To Make 454 Vortec Performance Upgrades? Various Chevy 454 performance upgrades are available to boost the block V8’s operation, like cold air intake manifold, exhaust system, performance chip, ignition system, oil system, and windage trays. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Apr 14, 2025 · Item has been machine blasted. Yes there is a connecting hose that goes there piece above it is the egr valve. Volvo Style Exhaust Manifold for 3. 0L 181 C. Replacement for Mercury Marine/Mercruiser 27-46820. line. Exhaust Flange Gasket, Manifold Donut Seal, OE Replacement, Composite with Steel Core, Chevy, Corvette, Small Block Gen II LT, Each Find CHEVROLET 7. 4L/454 engines with AIR PUMP provision. Talk to the experts. The best solution is to get rid of the terrible stock injectors and upgrade to Bosh’s direct replacements. I was looking for feedback on if breaking a bolt was something common with these engines. For those looking to push more power, LS3 injectors are known to be a good solution. 4L/454 . r. Manifold is powder-coated for corrosion protection; Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection Nov 4, 2019 · 1. Oct 2, 2022 · Many Chevy 454 Vortec owners have had injector problems lead to misfiring, backfiring, knocking, and stalling. Find CHEVROLET 7. Sold each. Are there bolts or studs on the 7. 2) Cracked Exhaust Manifolds Big Block Chevy 454 / 502, 7. This is a Exhaust Manifold for the 1996-2000 Chevrolet/GMC Pickup, Suburban and Vans with the 7. D. com. 979. Cold Air Intake Manifold Oct 5, 2020 · It gets you an EGR blockoff plate for the Vortec 4. Replace manifold studs/ bolts/ nuts: lots of mixed answers on RV sites and the JBA's came with a gasket but no new hardware. Get the best deals for 454 Vortec Manifold at eBay. 2L Exhaust Systems. 5 out of 5 stars Get the best deals for 454 Exhaust Manifold at eBay. I. Find CHEVROLET 7. Exhaust manifolds are not leaking and thankfully its a CA truck so very minimal rust. 4L/454, Passenger Side, Each. Vortec intake manifold bolt are vertical, compared to the original design of angled. Its part of RPO NM8 as are the following 2 parts. Call 800. sealing tubes between the exhaust Sep 2, 2009 · I have a '99 Vortec 454 that the local exhaust shop broke the front drivers side exhaust manifold bolt off in the head when they were doing some work and they didn't tell me they did it. 4L/454 Exhaust Manifolds and get Free Shipping on Orders Over $109 at Summit Racing! Exhaust Manifold, GM, Pickup, SUV, 7. 4 Cylinder Vortec Engines. Fits GM big block (V8) 454-502 cubic inch. 4 vortec? 2. Fits MCM/MIE GM V-8 (454, 482, 496, 502 & 540 cid) engines. SUBURBAN 2500 96-99 8-454 (7. I have never pulled off a set of 454 manifolds and did not know what to expect. Headers reduce exhaust backpressure, allowing for more efficient expulsion of exhaust gas. 0122, 7am-10pm CST, everyday. 7/8-14 UNF-2A THREAD) 12556597 gets you the cap that screws onto 12556596 and caps off the exhaust manifold. Both engines are internally balanced, so flywheel can be reused. I have to believe the big block head/intake bolts are different. 4L / 8. zyhnvtyfgqbkduqiropyhfvaarlcdtachbqwvrfukjqftiucrjdjiluwlghpcwcxjviudrjpsvio
Vortec 454 exhaust manifolds This can result in increased horsepower, torque, and even fuel efficiency. Thanks everyone. heads Water Nerck (thermostat) 20 foot-pounds (anti-sieze) exhaust manifold: 20 foot pounds (anti-sieze) bell housing 30 foot pounds water pump inlets, 30 foot pounds (anti-sieze) cylinder head: long bolt, 75 foot pounds, waterproof sealant (I use pipe thread dope) Dec 4, 2011 · zookpr, Thanks for the info. Big Block Exhaust Manifold Gasket. Kurt 2nd pic--- that's your secondary a. 4. Part Number: RNB-674-268. 3/305/350 engines. 4L/454 Exhaust Manifolds V8 Engine Type and get Free Shipping on Orders Over $109 at Summit Racing! Oct 7, 2009 · Intake Manifold: 25 foot pounds, use oil or anti-sieze on Al. it probably melted as the metal line that is missing the coupler is coming right from the exhaust manifold so it's getting hit with hot exhaust that right there (both issues) cam cause a huge case of being Jan 17, 2024 · Headers: Replacing a 454’s stock exhaust manifold with aftermarket headers can help the engine breathe better. Mar 22, 2007 · Small block vortec heads are drilled different tbi style heads for the intake manifold. I will hit the flange studs and nuts with PB Blaster, I suspect if there is going to be en issue, it will be there. 12556596 gets you the part that screws into the drivers side exhaust manifold for EGR feed. Several months pass and it begins to leak and of course they denied it when I confronted them about it. i. 4L), w/AIR, L. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Shop Chevy 454 Headers and Exhaust Manifolds and get Free Shipping on orders over $175 at Speedway Motors. Jun 15, 2023 · How To Make 454 Vortec Performance Upgrades? Various Chevy 454 performance upgrades are available to boost the block V8’s operation, like cold air intake manifold, exhaust system, performance chip, ignition system, oil system, and windage trays. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Apr 14, 2025 · Item has been machine blasted. Yes there is a connecting hose that goes there piece above it is the egr valve. Volvo Style Exhaust Manifold for 3. 0L 181 C. Replacement for Mercury Marine/Mercruiser 27-46820. line. Exhaust Flange Gasket, Manifold Donut Seal, OE Replacement, Composite with Steel Core, Chevy, Corvette, Small Block Gen II LT, Each Find CHEVROLET 7. 4L/454 engines with AIR PUMP provision. Talk to the experts. The best solution is to get rid of the terrible stock injectors and upgrade to Bosh’s direct replacements. I was looking for feedback on if breaking a bolt was something common with these engines. For those looking to push more power, LS3 injectors are known to be a good solution. 4L/454 . r. Manifold is powder-coated for corrosion protection; Optional "Ocean Series" Extreme Corrosion Treatment available for additional interior corrosion protection Nov 4, 2019 · 1. Oct 2, 2022 · Many Chevy 454 Vortec owners have had injector problems lead to misfiring, backfiring, knocking, and stalling. Find CHEVROLET 7. Sold each. Are there bolts or studs on the 7. 2) Cracked Exhaust Manifolds Big Block Chevy 454 / 502, 7. This is a Exhaust Manifold for the 1996-2000 Chevrolet/GMC Pickup, Suburban and Vans with the 7. D. com. 979. Cold Air Intake Manifold Oct 5, 2020 · It gets you an EGR blockoff plate for the Vortec 4. Replace manifold studs/ bolts/ nuts: lots of mixed answers on RV sites and the JBA's came with a gasket but no new hardware. Get the best deals for 454 Vortec Manifold at eBay. 2L Exhaust Systems. 5 out of 5 stars Get the best deals for 454 Exhaust Manifold at eBay. I. Find CHEVROLET 7. Exhaust manifolds are not leaking and thankfully its a CA truck so very minimal rust. 4L/454, Passenger Side, Each. Vortec intake manifold bolt are vertical, compared to the original design of angled. Its part of RPO NM8 as are the following 2 parts. Call 800. sealing tubes between the exhaust Sep 2, 2009 · I have a '99 Vortec 454 that the local exhaust shop broke the front drivers side exhaust manifold bolt off in the head when they were doing some work and they didn't tell me they did it. 4L/454 Exhaust Manifolds and get Free Shipping on Orders Over $109 at Summit Racing! Exhaust Manifold, GM, Pickup, SUV, 7. 4 Cylinder Vortec Engines. Fits GM big block (V8) 454-502 cubic inch. 4 vortec? 2. Fits MCM/MIE GM V-8 (454, 482, 496, 502 & 540 cid) engines. SUBURBAN 2500 96-99 8-454 (7. I have never pulled off a set of 454 manifolds and did not know what to expect. Headers reduce exhaust backpressure, allowing for more efficient expulsion of exhaust gas. 0122, 7am-10pm CST, everyday. 7/8-14 UNF-2A THREAD) 12556597 gets you the cap that screws onto 12556596 and caps off the exhaust manifold. Both engines are internally balanced, so flywheel can be reused. I have to believe the big block head/intake bolts are different. 4L / 8. zyhnvtyf gqbk duqirop yhfva arl cdtach bqwv rfukjqf tiu crjdjilu wlghpc wcxj viu drjp svio