Part Numbers: Ariens 04387900, Gravely 04387900, Husqvarna 587241601, 179334, 400008, 414336, 471717P, 532179334, 532400008, 532414336, Craftsman 179334, 400008, 414336, 471717P, 532179334. Includes alternate wire connection, required for select models so we include for Free. Fits: Poulan PB20VA48, PB22VA54, PB23H48YT, PB24VA54, PB26H54YT, 541ZX Husqvarna EZ4220, EZ4624, EZ4822, EZ4824, EZ4824C, EZ4824CA, EZ4824 TFBF, EZ5224, EZ5224BF, EZ5226 Fits: Poulan Pro AYP Southern States, Statesman, Husqvarana SO21H48YT, PB26H54YT, PB24TH54YT, PB24H48YT, PB24H54YT, PB22H54YT, P185117H, YTH2448, LT2318CMA2, LT2323CMA2, YTH2148, XT24H48YT, SP25PH48STB, SP25PH48STC, SP24H48YT, SP25PH48STA, SOGT22H48 Fits Husqvarna YTH1848, YTH2146, YTH2148, YTH2248, YTH2348, YTH2448, YT46LS, YTH23V48, YTH2454, YTH2546, YTH2548, YTH2748, YTKH1848, RZ46i, RZ54i, RZ4221, RZ4222, RZ4621, RZ4622, RZ4623, RZ4824, RZ5424, RZ5426, EZ17, EZ21, EZ4624, EZ5226 High Torque Coil: 110 ft-lbs (OEM is 95) Higher Torque Means this Clutch holds Strong Even in the Toughest Cuts. BigBearing: Addresses the number #1 clutch failure. A Bigger pulley bearing extends clutch life, and the pulley bearing is replaceable. HD Clutches are designed at HD Clutch and Assembled in the USA. Higher Torque: 110 ft-lbs (OEM is 95 ft-lbs). We add a few more windings to our coils to provide the maximum gripping strength to prevent damaging micro-slipping during tough cutting conditions. The HD Switch BIGBearing design addresses the #1 reason clutches fail with a larger tougher pulley bearing. Machined Billet Pulleys: It is easy to damage formed pulley and damage (even a small stone nick) damages the belt with every rotation. With our Billet Pulley design, we include a snap ring so the bearing is replaceable, making this clutch rebuildable. Clutches all run very hot; we use a composite material instead of plastic to allow the heat to dissipate much faster. This makes the HD Clutch run much cooler; extending the bearing and clutch life. HD Clutch wrote the Bearing specifications to include Premium C3 Rated Bearings and high temperature rated synthetic grease to combat heat. Less Heat = Extended Life.