2007 G35 Intake Project

[Fast355]

These are the stock manifolds. I think the longer equal length primary tubes and the nicely designed merge collector are responsible for the torque gains. A couple of small changes that make a huge difference. At first glance they look alot alike. Not until you put a tape measure up to the primary and realize it is 50% longer than stock and the stock ones have up to 2" of variation in length between shortest and longest although the short one and long one are on opposite banks.