650cc - 350z-370z, GTR VR38DETT, Skyline NEO RB25DET, Golf GTI R32 3.2L VR6

Installed these in my G35 and the difference in throttle response was immediate, especially noticeable at higher RPMs. They matched perfectly with my stock fuel rail.

Installed these in my G35 and the idle smoothed out immediately—no more hunting at stoplights. The flow matched perfectly on all six, which made tuning a breeze with my stock ECU. Definitely woke up the mid-range without needing new fuel rails.

The matched set in my R32 made tuning much more consistent across all six cylinders, but I wish the wiring harness adapter was included. They fired right up after the install and smoothed out the idle nicely.