Exhaust Systems
Header Adapter Plates

Header Adapter Plates, Flange Spacers & Kits

Racing with high-horsepower engines requires large exhaust headers. Sometimes the tubes on the larger headers is great enough that it covers the header bolt holes. In other cases, headers need to be moved out enough to clear obstacles in the engine bay such as suspension and chassis components. The solution is a header exhaust plate adapter or spacer kit. JEGS offers header adapters, SBC header flanges ( also available for Ford, Mopar, AMC, BBC applications), and kits from high-quality manufacturers such as Kooks, Moroso, JEGS, and others. View our wide selection of header adapter plates, flange spacers, and kits to help you complete your next engine or exhaust project.

The Advantages Of Purchasing Header Adapter Plates, Flange Spacers & Kits

Header spacers and adapter plates are designed to allow large tube headers, such as from Hooker headers or Schoenfeld headers, to fit cylinder heads such as those from Chevrolet Performance and other manufacturers. They also help headers clear chassis, suspension, and other obstacles so that they will fit properly.

Allows You To Fit Large Tube Race Headers To Your Cylinder Heads

Header and cylinder head adapter plates allow you to bolt big tube headers with a different bolt pattern onto cylinder heads using a standard bolt pattern. This results in the ability for the engine to produce more horsepower from the improved breathing.

Creates More Space To Help With Engine And Vehicle Fitment

Header adapter plates and spacers move the headers outward, which can help to clear chassis, suspension, and other components that may be in the way of routing the exhaust headers. Thickness typically ranges from 3/8" to 5/8", which can sometimes be just enough for that perfect fit.

When larger headers are needed for your engine, the bolt holes may not line up due to the larger tubes, requiring an adapter. Your headers may also be hitting vehicle chassis and suspension components and a header exhaust flange spacer may give you the room you need. To help you with your search, we have provided the below answers about header adapter and spacer options:

What Is A Header Adapter?

When using race headers that have tube diameters typically larger than 1 3/4", the header flange bolt holes will not be able to line up with the cylinder head without relocating them as the tubes will partially cover the original header bolt holes. A header adapter flange kit contains a plate that has been drilled and designed to bolt to the cylinder heads with a countersunk plate bolt or screw design (to allow the headers to bolt to the flanges flush) and with threaded holes for headers to bolt to the adapters. The exhaust holes are designed to be modified for proper port-matching between the header exhaust manifold adapter plate and cylinder head exhaust ports. A header gasket is required between the adapter and cylinder head as well as the adapter and headers.

What Are Header Spacers?

Exhaust header spacers are metal flanges that are designed to go between the cylinder head and headers, pushing the headers out. A header spacer is often used when the headers are hitting obstacles and by being moved out from the engine, will allow proper clearance required for installation.

Install Your Race Headers With Header Adapter Plates, Flange Spacers, And Kits From JEGS!

Large tube headers with a Stahl or other bolt patterns require header adapter plates in order to fit your race engine's cylinder heads. If your headers will not clear chassis, suspension, or other components, header flange spacers may provide the extra distance needed for proper fitment. JEGS offers high-quality adapters and spacers to help your exhaust headers fit. Browse our large selection of header adapter plates, flange spacers, and kits that will help you complete your next race engine project.

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