Installed my stillen ud pulley about 8k miles ago. No issues whatsoever. I can't really say I noticed a power difference, but the throttle response definitely improved.
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 '12 370Z + Sport | Stillen Gen3 Intakes | Stillen UD Pulley | Motordyne M370 | FI Exhaust | FI HFCs | 4.08 Gears | Uprev tuned
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