Boss240

Hey guys I just picked up a 2012 G37xS sedan the other day on an 18 month lease. I came from an 09 WRX. So I'm wondering how I can make this car faster for fairly cheap as I dont wanna dump a bunch of money on a leased car? Maybe an intake and tune or just a tune if thats possible? With the WRX you could buy a Cobb accessport and reflash the ecu and pick up a decent amount. Is there anything like that, that I can do with the g37 that I will notice a decent gain? I also dont wanna make this car extremely loud either. Will tuning the car with no mods make any gains? Sorry for my ignorance guys and I appreciate any help or advice you guys can give.

Boss240

Any1 know anything that may help? Whats the possible gains with intake and tune?

bluedevils95

iTrader: (2)

Get HFC. That will open it up a lot. The gain is 15+hp to the wheels. Don't get the intakes. You should just get the full exhaust w/ the HFC. Then you can tune it from there if you like.

Boss240

Will hfc's or hfc's with full exhaust cause a check engine light from the o2 sensors cuz of the increased flow if I dont get a tune right away?

bluedevils95

iTrader: (2)

I went w/ Fast Intentions. for everything. No check engine light came on. If you went w/ Ark exhaust and the berk test pipes the gain is more. My friend did that and he has higher numbers then me. Since i had the FI exhaust i wanted to stay w/ the same brand w/ the HFC but i wanted to stay away from the test pipes b/c of the smell i didn't want coming in the car.

Boss240

If I decide to go with exhaust I would get hfc's to pass a visual inspection. How much of a difference in horsepower/tq is there between you and your friends exhaust setups? What did your exhaust setup cost if you dont mind me asking? PM me if you dont wanna post how good of a deal you got on it lol. N how loud is is your exhaust over stock any rasp?

bluedevils95

iTrader: (2)

We both have 08 G35 sedan and he is pushing 13HP more then me w/ his setup. I am planning on getting Headers to see if i can catch up to his numbers. lol i don't have too much of a rasp on my car. I got all my parts 2nd hand but headers i am getting brand new unless someone sell me the one i want.

Boss240

Oh ok. Thanks for the info.

Dj1ofDet

iTrader: (5)

Oh you'll definitely get a check engine light...










J/k You're only likely to get one if you damage something during the install, i.e. an O2 sensor. I can agree that the most noticeable gains come from HFCs and an exhaust. I have an intake, but only because I got a great deal on it.

bluedevils95

iTrader: (2)

So, what are you planning on doing? I say get the ARK exhaust and if you want more power go w/ Test pipes. If you don't want that just go w/ HFC which is 2nd best.

Boss240

I may just go with an intake first for the noise and then get hfc's with a tune. I believe I saw something like ultra high flow or very high flow cats. Maybe get the higher flowing cats and keep the catback stock if thats possible. Damn I really dont know yet lol. I barely have $400 saved up yet as I have money on the side for my AK47 that I wanna get.

lopez13jesus

hi sorry for butting in.. but i was jus wondering if you can get just HFC's with a stock exhaust system?
sorry but im not to knowledged on all this stuff. thanks!

Boss240

I think bluedevils95 said it a couple posts up that you can just go with hfc's with stock exhaust and that would be second best over full exhaust and hfc's. Thats what I plan to do if and when I decide to do anything with the exhaust.

tlogic_g37s

i just had my hfc's put on yesterday and i have my stock exhaust. My car is definitely faster and more responsive. I can't say that all of this is from the hfc's considering i also had stillen headers and stillen gen 3 intakes installed, but i would definitely recommend getting hfc's for more power. My mechanic says that it makes the most difference with our cars.

Boss240

Does the car sound much different? Did you tune it before you started driving it on the road?