Flywheel is made from high magnesium content nodular cast iron material for greater strength and extended use. 2X stronger and less expensive than factory dual mass flywheel.
Small Block 168-Tooth Flywheel 12561680 LFW387 for Chevy for GMC Sierra Silverado 1500/1500HD/2500/2500HD/3500 /3500HD/Yukon 2001-2007 (4.8L 5.3L 6.0L OHV 8cyl/Vortec) GEN III IV LS SWAP
Ring Gear Count: 168 teeth
Material: Nodular Ductile Cast Iron
For Silverado 1500 (4.8L; 5.3L; 6.0L OHV 8cyl) 2001-2007, Also fits vehicles equipped with SBC (small block ) 4.8L, 5.3L, 6.0L LS with manual transmission (NV4500, T56) swap