Left side of a Ford Cologne V6 engine, clearly showing a (rusty) cast iron exhaust manifold - three exhaust ports into one pipe.
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Exhaust Headers

In automotive engineering, an intake manifold or inlet manifold is a part of an engine that supplies the fuel/air mixture to the cylinders. An exhaust manifold or header collects the exhaust gases from multiple cylinders into one pipe. more...

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Due to the suction effect of the downward movement of the pistons in a reciprocating piston engine, a partial vacuum (lower than atmospheric pressure) exists in the intake manifold. This manifold vacuum can be used as a source of automobile ancillary power to drive auxiliary systems: (ignition advance, power assisted brakes, cruise control, windscreen wipers, power windows, ventilation system valves, etc).

This vacuum can also be used to 'suck' any piston blow-by gases from the engine's crankcase. This is known as a closed crankcase ventilation or positive crankcase ventilation (PCV) system. This way the gases are burned with the fuel/air mixture.

The intake manifold is located between the carburetor and the cylinder head. On multi point injected engines, the intake manifold holds the fuel injectors.

Exhaust manifolds are generally and traditionally simple cast iron units which collect engine exhaust and deliver it to the exhaust pipe. However, when greater performance is required, this restrictive tube is often replaced with individual headers which are tuned for low restriction and improved performance. Headers have been widely available from aftermarket sources for decades, and some manufacturers have begun using them as original equipment. The Honda J30A2 engine does away with exhaust manifolds altogether, using an integral engine block passage to route gases directly to the catalytic converter.

See also: engine tuning

Read more at Wikipedia.org


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Doug's Headers Block Hugger Natural 1 3/4" Primaries D3.Doug's Headers Block Hugger Natural 1 3/4" Primaries D3. $312.90 Banks Stinger System 87-92 F250 F350 7.5L Standard CabBanks Stinger System 87-92 F250 F350 7.5L Standard Cab $636.38
Doug's Headers Tri-Y Silver Ceramic Coated 1 5/8" Prima.Doug's Headers Tri-Y Silver Ceramic Coated 1 5/8" Prima. $635.90 Titanium Header pipe wrap 50Ft w/ 5 Free Metal Zip TiesTitanium Header pipe wrap 50Ft w/ 5 Free Metal Zip Ties $27.00
Hooker 4902Hkr Headers Comp. Pontiac Firebird 326-400Hooker 4902Hkr Headers Comp. Pontiac Firebird 326-400 $276.59 1996-1997 Ford Probe Gt Mazda Mx6 Ls Oem header down pi.1996-1997 Ford Probe Gt Mazda Mx6 Ls Oem header down pi. $45.00
Obx Stainless Steel Header 06-09 Eclipse Gs 4G69 2.4LObx Stainless Steel Header 06-09 Eclipse Gs 4G69 2.4L $235.00 Sb Chevy Chrome Street Rod Block Hugger Headers 1954 Ol.Sb Chevy Chrome Street Rod Block Hugger Headers 1954 Ol. $69.95
Sb Chevy Street Rod Block Hugger Headers Black Sbc 265 .Sb Chevy Street Rod Block Hugger Headers Black Sbc 265 . $74.95 Chevy Cavalier Z22 Ls 2.2L 96 97 98 99 00 01 02 HeaderChevy Cavalier Z22 Ls 2.2L 96 97 98 99 00 01 02 Header $119.99
05-08 Porsche Boxster S 987 m2 Cat-Back Catback Exhaust05-08 Porsche Boxster S 987 m2 Cat-Back Catback Exhaust $299.99 Suzuki Samurai Hedman Hedder Samurai Header Rock crawl.Suzuki Samurai Hedman Hedder Samurai Header Rock crawl. $91.00
1988 - 1995 Sb Chevy Gmc Truck Chrome Headers 2Wd 4x41988 - 1995 Sb Chevy Gmc Truck Chrome Headers 2Wd 4x4 $99.95 Bbk 16150 1996-2004 Mustang Gt Shorty Headers CeramicBbk 16150 1996-2004 Mustang Gt Shorty Headers Ceramic $419.99
Mitsubishi Lancer Es Ls Oz Rally 2.0L 2002-2006 HeaderMitsubishi Lancer Es Ls Oz Rally 2.0L 2002-2006 Header $129.99 Dc Sports 4-1 Ceramic Header 96-00 Honda Civic ExDc Sports 4-1 Ceramic Header 96-00 Honda Civic Ex $308.99
Dc Sports 4-2-1 Ceramic Headers 00-04 Toyota Celica GtDc Sports 4-2-1 Ceramic Headers 00-04 Toyota Celica Gt $308.99 Integra Da6/Da Rs/Ls/Gs Stainless Steel Header/Exhaust .Integra Da6/Da Rs/Ls/Gs Stainless Steel Header/Exhaust . $59.99
Hedman Universal Header X-Tension 18713Hedman Universal Header X-Tension 18713 $49.90 Sr*S Bellmouth Down Pipe Downpipe 02+ Subaru Wrx/Sti 4"Sr*S Bellmouth Down Pipe Downpipe 02+ Subaru Wrx/Sti 4" $98.88
Integra 94-01 Dc/Dc2 Stainless Steel Catback Exhaust Sy.Integra 94-01 Dc/Dc2 Stainless Steel Catback Exhaust Sy. $109.99 94 95 96 97 98 99 00 01 Acura Integra Gsr Dc2 Coupe/Sed.94 95 96 97 98 99 00 01 Acura Integra Gsr Dc2 Coupe/Sed. $69.95
Doug's Headers Full-Length Natural 2" Primaries D452-RDoug's Headers Full-Length Natural 2" Primaries D452-R $538.90 Turbo Heat Shield Blanket 4 Turbocharger T3 T4 T66 T88Turbo Heat Shield Blanket 4 Turbocharger T3 T4 T66 T88 $90.00
1970 ~ 1981 Chevy Camaro Polished Stainless Steel Heade.1970 ~ 1981 Chevy Camaro Polished Stainless Steel Heade. $184.95 Hooker headers 70-81 Camaro 396 427 454 502Hooker headers 70-81 Camaro 396 427 454 502 $300.00
Bbk 1531 1-5/8" Long Tube Headers 79-93 Mustang 5L AutoBbk 1531 1-5/8" Long Tube Headers 79-93 Mustang 5L Auto $369.99 Sb Chevy Ceramic Headers Chevelle Camaro Malibu Bel AirSb Chevy Ceramic Headers Chevelle Camaro Malibu Bel Air $169.95
1996-1997 Ford Probe Gt Mazda Mx6 Ls V6 Oem exhaust man.1996-1997 Ford Probe Gt Mazda Mx6 Ls V6 Oem exhaust man. $85.00 C5 Corvette Ls1 Stainless Steel full length headersC5 Corvette Ls1 Stainless Steel full length headers $850.00
Bbk Headers Shorty Steel Chrome Chevy Pontiac Camaro Fi.Bbk Headers Shorty Steel Chrome Chevy Pontiac Camaro Fi. $412.94 Obx Stainless Steel Header Honda Fit Jazz Gd3 07-08Obx Stainless Steel Header Honda Fit Jazz Gd3 07-08 $175.00
1988 - 1995 Sb Chevy Gmc Pickup Truck Polished Ceramic .1988 - 1995 Sb Chevy Gmc Pickup Truck Polished Ceramic . $154.95 Toyota 86-92 Supra 7Mgte Ma70 Turbo Headers ExhaustToyota 86-92 Supra 7Mgte Ma70 Turbo Headers Exhaust $149.99
3000Gt stealth Sl engine headers header exhaust block3000Gt stealth Sl engine headers header exhaust block $48.00 Doug's Headers Headers Tri-Y Steel Natural Chevy Bel Ai.Doug's Headers Headers Tri-Y Steel Natural Chevy Bel Ai. $427.90
Hedman Specialty and Engine Swap Hedders Fenderwell Pai.Hedman Specialty and Engine Swap Hedders Fenderwell Pai. $636.44 cobalt ,ion,hhr headers ss redline or base modelcobalt ,ion,hhr headers ss redline or base model $80.00
Hedman Header Reducers 3" Inlet / 2.5" Outlet Ball And .Hedman Header Reducers 3" Inlet / 2.5" Outlet Ball And . $39.94 2007-2010 Sentra Ser Spec V 2.5L m2 Header + Downpipe2007-2010 Sentra Ser Spec V 2.5L m2 Header + Downpipe $199.99
1971,1972,1973​,197 4,1976 Cadillac Exhaust Header Pipe1971,1972,1973​,197 4,1976 Cadillac Exhaust Header Pipe $79.99 Dc Sports 00 01 02 03 Toyota Celica Gts Ceramic HeaderDc Sports 00 01 02 03 Toyota Celica Gts Ceramic Header $307.95
Obx Stainless Steel Header Pontiac G6 St V6 3.5L 05-06Obx Stainless Steel Header Pontiac G6 St V6 3.5L 05-06 $289.00 Bbk Shorty Headers Silver Ceramic Coated 1 5/8" Primari.Bbk Shorty Headers Silver Ceramic Coated 1 5/8" Primari. $512.94
Flowtech Headers Shorty Painted 1 1/2" Primaries 91668F.Flowtech Headers Shorty Painted 1 1/2" Primaries 91668F. $241.90 1991 - 1999 Jeep Wrangler Cherokee Grand Polished Stain.1991 - 1999 Jeep Wrangler Cherokee Grand Polished Stain. $141.95
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Prices current as of last update, 02/05/12 1:10am.

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