Originally Posted by Footloose301

I installed the GTM Resonated test pipes and it is LOUD at WOT and still fairy loud above 3k RPMs. If you're cruising on the interstate at 80 you'll hear more tire noise than exhaust. As soon as you get around 90 it over powers the tires, at 100+ it's at the point where you have to yell to the person sitting beside you.

I love the way the HKS performs. However, there is some rasp after I installed the test pipes, which was predicted anyways.