Quote:
Originally Posted by TheSt|G
Supersprint says the headers deleting the primary cats are good for 6hp.
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that would be a pretty low estimate, looking at the stock headers.. well they absolutely 100% SUCK.
though considering you're talking about a 128i not a 130i, it could be closer to reality...
oh, unless they're talking about JUST deleting cats from stock headers, not going full aftermarket.. then 6 is probably bang on and a pretty solid increase
