Pro Design PD305 Cool Head Dome - Standard Bore (19cc) engine-pistons 1990-1992 Polaris 650 RXL

1990-1992 Polaris 650 RXL

1997-2003 Harley Davidson XLH883HUG Sportster 883 Hugger

2015-2019 Can-Am Spyder F3-S (SM6)

1988-1993 Suzuki LT230E QuadRunner

NOTE: Not for use with S&S 79cc heads

Pro Design PD305 Cool Head Dome - Standard Bore (19cc) engine-pistons 1990-1992 Polaris 650 RXLBillet machined design offers noticable bolt on performance gains. Increased torque and power as a result of increasing compression. Larger water jacket area supplies more water; you get the ultimate in cooling efficiency by eliminating overheating. Cool Head shells and Cool Domes sold separately to give you a choice of compression ratios. Features include O ring seal (no gaskets required) and adjustable and removable compression domes. Race Gas Only.