so iv finally found a setup im really looking into runing i found some guys on the net who claim to make
a
pritty good custom muffler http://www.magnumtuning.com/en/detai...initi/G35/3.5L

they say that each muffler is engineered and tuned only for your engine and they promise 7+HP and 10% accelerarion lol i thout the g35 was fast enough off the line another 10 % would be unreal lol (sarcasm) now my only problem is how do you measure acceleration? through torque im guessen or the whole 0 to 60 thing. i havent even seen any of there products on youtube but if i was to buy anything from these guys it would be the muffler hey i guess you cant go wrong when they have 3 different sound levels to choose from!DOMO