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Welcome to DRIVER Ray, Congratulations on finding a very clean '05 coupe! Best first mod for your G35 is Motordyne's 5/16" spacer ISO Copper. Everyone I know considers that the "Best bang for their Buck." Intake, all you really need is a Z-Tube and a K&N drop in filter. Exhaust, save your $$ until you can afford one of Motordyne's systems....they offer true quality and gains in RWHP along with an incredible sound! That's a start....Gary
#15
I've read that ISO copper is only needed for cold environments. I, too, live in Orange County where the ISO thermal is just fine. You can find the ISO thermal on eBay for just over $200.00. Usually sold by OC Infiniti.