Information?? High quality chassis partseries products. Made with high strength steel tubing for superior strength and durability. Stable performance, reliable quality and long service life Uniform thickness, no blow holes, slag, cracks, tearing, or incomplete fusion. Measured by specialized inspection tools after welding to make sure assemble hole , bushings insert, and installation sizes are proper. Professional InstallerisHighly Recommended(No Instruction Included) Alignment Highly Recommended After InstallProduct?? Stable characteristic, high reliability. Unique charm, wear-resisting durable and undamage. Easy to install. No drilling and cutting required. It is a good choice to replace an old one.Compatibility Chart?? For GSR LS SI B16 B16A B16A2 B17 B18B1 B20B B20Z B18C B18C1 B18 B18A1, DOHC B series EnginesPackage Content?? 8 x Flywheel Bolts