anybody do this up grade to there 350z and do you feel a big horsepower difference...( IVE ALREADY DID THE TWIN INTAKE UPGRADE WITH THE LONG DOUBLE PIPE FROM STILLEN)I did this to my 92 300zx i felt a good amount of power back in the day and that was with 222 hp z

If you remove the serpentine belt, its only worth about 15hp at red line. The AC clutch already disengages at full throttle. All your really spinning is the power steering and alternator.

Realistically, you might pick up a few HP and since inertia is lower, it might.... and I stress this.... might rev quicker in neutral.

Unorthodox Underdrive Pulley Review

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06 Lemanz Sunset Track Z
Zaino Convert