Zach

Hi, I bought this exhaust.
http://www.evasivemotorsports.com/Merchant...Code=HS00HS1GTP

Please advise if I need to buy a test pipe as well.

I'm not too sure

superpirate

Its not a necessity. More if you want one or not.

Zach

$ spent on test pipe worth the gain (if any)?

suzuka-blue-s2k

My opinion, yes. I think a test pipe is well worth the money. You will gain a few ponies, I like the sound of that invidia with the test pipe. It will make the exhaust louder, but it will help with the drone a little bit. So I say get one, but no you dont have to.

Zach

Thanks guys, decided, I will get one

BumbleBee01

Get one for sure its like 80 or less and has better flow than your stock cat, but make sure to get one with cel fix. Its going to be LOUD with your N1!!!

Little_AP1_S2K

test pipe on my n1 sounded way to raspy

superpirate

I'm using a 70mm berk test pipe with my invidia single and it sounds good. Its nice and loud, but the cel fix works perfect. Keep in mind though your 06 may not respond as well to the cel fix

Angerman

Yes.

Crackerballer

I have the same setup (for now) on my 2002. The TP helped with drone, but the car did get quite a bit louder at WOT. People have proved many times the gains are worth it.