Originally Posted by synolimit

Dont port the oem ones if youre doing a custom mani. Get two maxima TB's with the same plug as ours and port those. They start at like 70mm while ours are only 58mm. Porting will only get you 63mm while porting a maxima will get you closer to 80mm. At that point ditch the injen with the 2.75" pipe and 2.5" MAF housing and go full 3"!