Head Intake & Exhaust Valves Seals Kit For Yamaha 3YF-12121-00 5KM-12111-00Set 5 Cylinder Head Intake & Exhaust Valve Kit For Yamaha YFM660 Grizzly 660F Raptor 660R 2002 2008 Features: Aftermarket intake and exhaust valve kit. Kit includes intake valve, exhaust valve, valve stem seal and valve cotter (you get exactly what is pictured). Valves are forged steel one piece constructio. Cheaper equivalent of the original with decent quality. Specifications: Condition: Aftermarket 100% Brand New Material: 21 4N Steel Type: Head