since there are 4 resonaters built into the hks will there be rasp with non resonated test pipes?

 

Where do you live that you can get away with test pipes? Must be Flordia!
Unless you get the right test pipes you'll have rasp with any exhaust system.
Locate some with resonators, they're quite common.....do a search.

 

Search so many threads on this like 100's lol

 

yes and it will sound like crap

even with resonated test pipes you will have rasp just get high flow cats

https://g35driver.com/forums/engine-drivetrain-forced-induction/180164-test-pipes-high-flow-cats.html

 

i had this exact same set-up hks with fi resonated test pipes...imho made hks the sound more violent. no rasp at all for me. here are some videos for you to decied....

first one hks w/fi resonated tp <---this is the video that convinced me to go this route....



second hks w/crawford cats

 

i have that same setup HKS with FI resonated testpipes. I LOVE the way my car sounds...theres nothing on earth that could make me convert to HFC. The way my cars screams in the upper rev range is just beautiful plus the there is no drone inside the cabin and the the rasp is only slightly audible from the outside you wont hear it in the cabin but i must emphasize how little rasp actually exist with this setup, my friend with RT cats and hks has more rasp than my car.