SFI certified billet aluminum 3 hp diameter flywheel for Jr Dragster engines (no fins). The keyway is in the stock position when the flywheel's indexed adjustable timing hub is set to the negative side of the index range. Index marks are in 2° increments which allows up to 14° timing advance from the stock position (24°-38° range). The flywheel weighs 2.9 lbs and has a super-strong rare earth neodymium magnet. Minimum coil gap .030" Torque to 65 ft/lbs
If your engine's block is not designed for a 3 hp diameter flywheel, you may need a #5990 coil bracket.