I would say it will help, it might help around 30% of the rasp, but it wont be a miracle worker..

 

Would a resonator do more than 30%?

 

larger resonator as well should help...

 

matt just do the hf. you've already heard what mine sounds like and we basically have the same exhaust setup now that you have a header/dp. only diff is i have the hf that rrm sells which is pretty much a magnaflow as well