medicalstudent

why not? I ran a custom one and a Megan TP. I saw a 3-hp increase with my custom, but my claim is very unscientific though.

Post thoughts here...

EVAN&MONICA

I really like my Invidia 70mm the butt dyno says it helped up top more then anything and actually helped kill the drone from my single. Also gives the exhaust in general a more agressive tone

Sugestion:
Maybe we could make this thread to include Hi-flow cats as well

s2k aok

i support the high flow cat over the test pipe. i'm going to save the earth one exhaust system at a time...

57udl3y

lol we are gonna have an offcial everything thread. but yes i'm down with doing both testpipe and HFC there rn't many options in both so this should be short i'll come up with a quick list later

McMuffin

Invidia 70mm test pipe. The Butt dyno shoes great gains in the mid and upper rpm range. A must buy.

dewey

i got the berk HFC and t1r 70-em very nice

ebisu8

i have the berk's test pipe mated with my J's 60rs. so far so good.

MrBean1

I know I have only been asking questions...I will try to stop but at least one more...

Is a test-pipe really going to get you a lot more horsepower over a high flow cat? Or do people mainly use test-pipes for sound?

CooperS2K

cost. test pipe can be like what 80 dollars? where as HFC is 250 then if youre lucky you can sell your cat. thats at least how i look at it

Chris@NLM

I have the skunk2 70mm, best bang for the buck.