Grounding kits

Ztoon

UD was a couple months later. No issues with the install. Took the shop about an hour 'n a half. No noticeable difference with any of the charging systems. The pulley is only 20%, so wouldn't anticipate any problems. I also use the Gates belt. It's much better quality than stock, and as I recall, Stillen threw it in.
Performance wise, the UD pulley is great bang for your buck.

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Stillen G3|CBE|ground kit, F.I. H.F.C., C.F. fangs|mirrors|pillars, Hotchkis, SSR Type-F, RE-11, UpRev, BC BR coilovers
15% tint, LED black hdlts, color match handles, Dynamat, tail lt. tint, Mines C.F. frt. lip|rear spoiler, Amuse rear,skirts, vented fenders, c.f. vented hood, gloss blk. roof

hfrog355

Threadjacking myself to turn this to pulleys...

What differences did you notice with the Stillen pulley? This is another mod that I'm not sure how much of an impact I would notice.

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2009 7AT Touring - Black on black
VentureShield; F1 Tint; Stealth Signals; LED backup + trunk lights; Stillen HFC; MR Works Headlights; VHT tails; GTR Start Button

earwicker7

The Stillen pulley weighs a fraction of the amount of the stock pulley. You wouldn't think it's much, but trust me, holding them both in your hand, you can tell there is a big difference.

Because of the lower weight, the engine revs a lot quicker. In other words, say that at 5000 RPM, you make X HP pre-pulley and (X+5) HP with the new pulley. That may not sound like much of a difference, but the thing is that you get to 5000 RPM in less time, so that (X+5) HP is available sooner.

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2009 Magnetic Black 370Z with Touring, Sports and Navigation Packages--Fast Intentions CBE with 12" Resonators/Carbon Fiber Mufflers and LTH--Stillen G3 Cold Air Intakes, Underdrive Pulley and Grounding Kit--Uprev Tune