21-23 Yamaha WR450F WR 450F 97mm 14.3:1 CP Piston Full RACE CT Coated Piston Kit Outlander 650 Can be used with pump

Can be used with pump or race gas

Replaces Polaris OEM Part # 3610176

the MLS (Multi-Layer Steel gasket) head gasket is constructed with three blades: the outer blades are in rubberized sheet metal

New "rolled threads" machining process for studs

Feedback: Positive reviews and feedback are greatly appreciated

21-23 Yamaha WR450F WR 450F 97mm 14.3:1 CP Piston Full RACE CT Coated Piston Kit Outlander 650 Can be used with pumpMX1111, MX1110, B2W 116A0 00 00, B2W 11631 00 00, B2W 11603 00 00, BR9 11633 00 00, BR9 11633 10 00, 93450 19052 00 CP Pistons MX1110 21 23 Yamaha WR450F 14. 3: 1 97mm STD Bore 449cc Piston Kit Pro Race Piston Kit Outperform the Competition with the CP Carrillo Pro Race Piston Kit 97mm bore size and 14. 3: 1 compression for maximum displacement and power Ceramic piston crown coating for improved thermal efficiency and fuel burn DLC coated wrist pin