Aftermarket Parts

A motor vehicle component not from same manufacturer that can be separated from or attached to a system; a detachable piece. parts and supplies. Manifolds Switching from an exhaust manifold to exhaust headers will decrease the amount of back pressure and in turn increase the high-end power of the engine. This is because manifolds take the exhaust gas and shove it into the exhaust pipe as quickly and cheaply as possible. Manifolds are usually made of cast iron, and the exhaust needs to make an almost 90 degree turn after exiting the port then travel down a short pipe to the catalytic converter. Headers are more expensive than a manifold since they generally use a series of specially bent and sized pipes to gently merge the exhaust from each cylinder into a larger pipe, just before the catalytic converter. 

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