vtec or aftermarket?
#7
RE: vtec or aftermarket?
your talking about the advantages of a vtec exhaust manifold versus a stock 1.5 non vtec exhaust manifold?? there have been tests on the 99si with a b16 that installing a header on a stock motor has actually lost power versus the stock manifold. i'd say if u have one laying around slap it on. but it really depends on your intentions with the car. i would do something other than a header first like a good cat back exhaust. that will free up some ponies as well as a cai.
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