1994 BMW 325is Q&A

1994 BMW 325is Question: add power/speed

what would be the best parts to use for gaining power/speed? and if i put a new muffler on it what would be the best for bmws -
Answer 1
Running highest octane fuel available and freeing up the intake and exhaust would be the best step Anything further might reduce the market value of your car and running values -