Author Topic: Whats better for performance, a 4-1 exhaust manifold or a 4-2-1 exhaust manifold  (Read 1327 times)

darren

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Recently, i wanna to improve my cars horsepower, but i dont konw whats better for performance, a 4-1 exhaust manifold or a 4-2-1 exhaust manifold???

everyone who can help me, thanks.

 

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