<p> Yerf Dog Driver Unit Q43201W - 3/4" 30 Series GO KART TORQUE CONVERTER DRIVER CLUTCH PULLEY TOP QUALITY AFTERMARKET REPLACEMENT PART NOT MADE BY COMET </p> <p>It replaces COMET 20/30 Series Torq-A-Verter Driver pulley. It works with 3-8hp engines. The 30 Series is heavily used in ATV's, LTV's , GO KARTS (Manco, Ken-bar, Murray, Yerf-dog). 30 series is asymmetrical one side is flat the other side. kit includes: Driver Unit: 1 X 30 series Driver, 1 Bolt holder (5/16"), 1 Crankshaft bolt (UNF 5/16 -24) and 1 lock washer</p>