10 Rib 70mm Idler Pulley 10 Rib 70mm Idler Pulley This pulley is used in the DMS 10 rib kit and can actually accept an 11 rib belt making it acceptable to run on the LS9 belt drive. However this product is designed to replace the factory lower idler on the LSA drive... MSRP: Was: Now: $89.99 Add to Cart