| Originally posted by stovski@Oct 16 2003, 09:05 PM |
If you think about it, not that much. If you can intake more air than you can release your've accomplished nothing(assuming you have no exhaust or catback). Need the works to get get some noticeable hp gains.
Bolt-ons in general are pretty dumb for BMW's, considering how much engineering already went into getting the most HP possible out of the stock setup.
The real bottleneck on M20's is the head. 2 valves per cylinder = crap.
If you want more power from your stock motor, get a chip and feel some real gains. B)