Keith, I still have my berk's testpipe on. Regardless if my CEL shows up or not. I don't really mind the smell and the excessive pollutant that my testpipe puts out. I just love the sound and the feel of it paired with my mugen ap2 exhaust.

 

i used to have a berk tp, but i got too paranoid (cops)...so i bought a high flow cat

 

Any brand tp is the same. TP probably gives you the greatest hp/$. If you don't like the smell or care about the environment or your state doesn't allow it, then go with HFC.

 

Had one on, just wanted it there to get rid of stupid drone. Took it off, not really paranoid or anything but just figured one less thing to stress about in life here in good ol' California.

Will most likely get a HFC soon though yay!

 

I have a berks TP on and love it...yes it stinks, but you get used to it after a while. Now onto the enviroment, do you people know that the global warmer theme is a scam for some companies to make billions?? It's a natural cycle that the earth goes through.

 

You forgot an option:

Yes I have one and I want to go back because it is a waste of time (as a mod by itself), smells bad and messes with the environment.

 

I had to remove it because the smell was really bad!

 

Are HFC illegal in california? I'm assuming so.

 

Personally i WOULD run a test pipe on a s2k.
I dont get the point about the environment with automobiles lol.
Heres my philosophy:
The O-Zone is going away anywayz, Might as well enjoy doing it!