like the post says i just got a new muffler
its a apexi ni turbo muffler and i was wondering what is the best setup to use in my car. btw i have a mazdaspeed and we have 2 cats. i hear people just use a downpipe and by pass the cats and others use high flow cats im not really literate in the exhaust genre. pls help me out by posting what your guys did with your exhaust and suggestions.
its a apexi ni turbo muffler and i was wondering what is the best setup to use in my car. btw i have a mazdaspeed and we have 2 cats. i hear people just use a downpipe and by pass the cats and others use high flow cats im not really literate in the exhaust genre. pls help me out by posting what your guys did with your exhaust and suggestions.
