Invidia N1 with TR1 test pipe ?
 

Hi guy !
I buy invidia n1 with invidia test pipe, it sounds great until I let off the gas which results in a lot of rasp.. Like a stripe pipe civic 99...
Will the T1R resonated test pipe remove this, or should I buy a Berk 70mm HFC ?

Thank you !

I have never heard of nor seen a "resonated" test pipe before but if it is resonated then it (and the Berk HFC) would LESSEN the rasp. they would not remove the rasp entirely. Maybe you'll like the level of raspiness after that. The stock cat almost completely negates any rasp but then you lose power in comparison to a TP or HFC so you wouldn't be getting the full potential of your Invidia system.