I was thinking bout getting the Injen CAI and the Injen Cat back exhaust and test pipes...any suggestions or comments on on injen products? according to their site and dynos i have seen the exhaust system adds about 12hp to the wheels and same with CAI dunno bout test pipes though...suggestions?maybe different brands?? what springs should i get???? i saw some Tein springs only for about 180.

 

Do you actually believe the hp and torque gain of any companies claim???

 

I personally have friends that work for Injen and I have been to their facility, seen the dyno and know of their quality work as I have the Injen CAI and SES exhaust on my G35. I have always used Injen products on all my cars and their quality is top notch. The CAI and SES combo is great and I highly suggest it. I don't have experience with the test pipes though, witht he SES I'm sure it would be ridicuously loud. IMO, you can't go wrong with Injen.

 

From what I have gathered through research on this board and others there is no possible way that A CAI on the G35 will add anywhere close to 12RWHP! I'd say you'd be lucky if you got 5rwhp.