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      06-24-2008, 05:44 PM   #6
skierman64
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Drives: 2008 E92 Space Gray M3 & E36M3
Join Date: Dec 2006
Location: Greater St Louis Metro area

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1998 M3 Coupe  [0.00]
2008 M3 Coupe  [0.00]
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My question is if the car comes with headers from the factory, how much a performance increase do you think aftermarket headers will give you? It's not be as much of an increase as going from a manifold system to headers like you did in the E46.
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