Originally Posted by kevin///mlee
Macht Schnell test pipes remove the primary cats and are much cheaper than the x-pipe option. Although a race x-pipe like the challenge one would be much louder as it removes all cats and resonators
Originally Posted by M3PO
Get some test pipes. They will increase the volume and give you a noticeable power bump. Best mod for the M3. You will get a CEL so you will need a tune or a CEL fix (like Akra delete-R or BMS downpipe fix). There is no reason to buy a new x-pipe.
Removing the resonators won't make it much louder, just more "unpleasant". Resonators help to remove some unpleasant tones more than they muffle the sound (hence the need for that big ass muffler).
Would test pipes make my car sound raspy? whats cheaper a tune or a CEL fix eg akra delete-R or BMS downpipe? im modding on a budget
M3PO thx for the tip about removing resonators, i dont want more unpleasant sounds.
hmmmmm what to do... lol