The combination of materials, heat treating, and cut geometry allow for a gear set that has ten times the life of a non-OEM ring and pinion gear set. Application: 1972-2013 GM 8.5 and 8.6... 3.73 RATIO RING & PINION GEARSET3.73 RATIO RING & PINION GEARSET - For 2.73+ cases OR when replacing a 2.73 or numerically higher gearset - GM CORP 8.5 inch National Drivetrain GM 8.5/8.6 10 Bolt 3.73 OE Ring & Pinion Ring And Pinion 3.73 GM 8.5" ING AND PINION SET, 10 BOLT | 3.73 GM 8.5" ING Pinion Bearing Buy Walke 45261 Exhaust Tail Pipe 2 Inlet (ID) 2 Outlet (OD) fo Chevolet S10: Exhaust Pipes & Tips - FEE DELIVEY possible on eligible puchases