well thats about it, theres a weird rasp in the exhaust tone at specific RPMs, like 2500, 3300 and then a little higher...i installed a test pipe so im pretty sure its due to that but does that make sense to be only at certain RPMs? thanx in advance

 

It gotta be the test pipe, as the rpms, i dunno buts it gonna be raspy alot now.

 

it's your test pipe for sure, i had a custom exhaust built and when the piping was cold it was raspy as hell, I had a resonator put in, took care of the rasp