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Another pulley required for this combination was the integrated damper/crankshaft pulley. Because the engine didn't use the stock LS9's dry-sump system, a slimmer wet-sump oil pump and shorter-snout crank were employed. However, the engine still required a wide, multi-rib damper pulley that would place the 10-rib serpentine belt (and narrower A/C belt) at the same position as the stock LS9. Thomson got that custom damper from ATI. It's shown here at left, with the LS9 pulley on the right. View Related Article
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