Headers

Is the factory exhaust manifold a bottleneck in your project? Headers – manifolds with separate tubes for each cylinder – can give the exhaust gas a freer path out and affect both power and sound. This category contains individual headers and complete header kits for you who want to improve the exhaust right from the engine.

What headers do

Headers replace the original exhaust manifold and can reduce back pressure, making it easier for the engine to expel exhaust gas. How much it gains depends on the engine, calibration and the rest of the system. Under individual headers you will find single parts, while header kits typically combine several components, e.g. headers with connection pipes. The range includes long tube and Tri-Y headers from Kooks Headers as well as long tube header kits from Stainless Works. JBA, BBK and Gibson are also represented.

How to choose headers

Consider several factors together – bigger tubes do not automatically mean more performance:

• Tube diameter: sizes such as 1-7/8 x 3 inches indicate the primary tubes and collector and should match the engine's displacement, rev range and power goals.
• Tube length and space: long tube headers can shift where in the rev range the engine performs best, but require space and may require modification of the rest of the system.
• Connection: some sets have connection pipes with a catalytic converter, others connect directly to the original system. If parts are missing, see catalytic converters.
• Material: stainless steel features in many part numbers and typically withstands heat and moisture better than regular steel.

Installation, heat and inspection

Check that the part number fits your engine and model year, and see which gaskets and bolts are included. Headers give off a lot of heat in the engine bay, so heat protection can protect wiring and hoses. Whether headers are road-legal depends on the product and the car – check the approval for the specific part number.

Frequently asked questions

What is the difference between headers and a header kit?

Headers are the manifolds themselves. A header kit typically combines headers with additional parts, e.g. connection pipes, so the transition to the rest of the system fits. The contents vary, so check the description for the specific set.

Does the engine management need adjusting after installing headers?

It depends on the engine, the headers and other modifications. Long tube headers and changes at the catalytic converter can affect the air-fuel ratio and the oxygen sensor signals, so a calibration adjustment may become necessary.

Can headers be approved for inspection?

It depends on the product and the car. If the catalytic converter is relocated or removed, it can affect emissions and approval. Always check the documentation for the specific part number before installing on a registered car.

Why do my headers tick after installation?

A ticking sound is often caused by a leaking gasket at the cylinder head or at a joint. Tighten according to the manufacturer's instructions, and re-tighten once the headers have been hot if the instructions recommend it.