Well, unfortunately I got pulled over last night, the officer said
"I pulled you over because your exhaust is not only illegal, its absolutely obnoxious"

Luckily yesterday was my birthday, and he was a good dude, and gave me a warning. But, as I'm sure you're all aware, that warning is merely a "I'll get ya next time."

So my question is, if I go with HFC instead of test pipes. Will it effect the sound much? Or do I have to go back to stock cats, and give my car asthma again?

 

Bummmmmmmp

 

HFCs will take a bit of the sound out. No need to go back to the stockies. Just make sure that the HFCs are "worthy" for your car. Some HFCs can induce a mean rasp, then again any HFCs would probably be better in terms of rasp than test pipes.