I don't know?
 

was doing a little search for parts and these two listings came up on CL...
put one of those reactions on my face like this :eek and decided to share this.
g35x "SPORT": looks like stock exhaust instead of Magnaflow, 40 hp gain!
Atleast the M has an exhaust lol

http://dallas.craigslist.org/mdf/cto/3258844861.html
http://dallas.craigslist.org/dal/cto/3187327221.html

40hp from a CAI?? Looks like a short ram intake from the pics too. Looks nice & clean but agree, the exhaust looks stock at least from the rear pic.

what a way to destroy the looks of a perfect car.

http://images.craigslist.org/5L65Ga5...8f9ccf1009.jpg

man that M is hideous. The other G looks great but agree with previous post, the cold air intake is more like luke-warm. Drive to Florida and i'll sell mine with the 2010 g37 sport front fascia,stillen intake, invidia cat back, tune, 281wph 259tq for 20k 70 miles.

That claim of a 40 HP gain is a joke. I bet he's actually losing power across the majority of the rpm band compared to stock, with a modest (single digit at best) bump in the uppermost rpms.

Agreed about the exhaust, it does look stock from that pic.

As far as that M goes -