so which should i use? resonated test pipes or hfc's? i dont care about the legality or emission crap. i just care about which would sound best and provide the best gains
im going to have a magnaflow exhaust built aswell

 

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i would just go test pipes if u have a good exhaust with resonators and mufflers you will be fine... and the difference between the resonated test pipes and regular are not noticible i had resonated and changed them out for regular ones and no diff... any exhaust mods you do you will have slight rasp at 3500-4500 but good rasp not fart can unless u get like a 3 inch exhaust lol