I've decided to go ahead and purchase a beluga axleback for my stock '12 sport x coupe. I feel as if it is going to be exactly what I want for the price and im super exited to install it. As far as my question goes I would like to know what would be my best bet to get more sound out of this exhaust. Test pipes or HFC?
Also im looking to weld on quad tips is this a bad idea or should it be just fine? Thanks

 

buy my berk hfc

https://www.myg37.com/forums/private...flow-cats.html

test pipes wont pass inspection

quad tips ew

 

Yeah, test pipes won't pass unless you plan on doing R&R each time you need to smog. IMO quad tips would look silly without a new rear bumper with different exhaust cutouts.