Pro Design PD306 Cool Head Dome - Standard Bore (20cc) engine-engine-covers-water-pump-covers 2017-2018 Arctic Cat ZR 8000

2017-2018 Arctic Cat ZR 8000 El Tigre ES 129

covering on both sides to guard against scratches

2006-2012 Yamaha XV1900CTS Stratoliner S

1994 KTM 440 SX

2003-2004 Honda CRF230F

Pro Design PD306 Cool Head Dome - Standard Bore (20cc) engine-engine-covers-water-pump-covers 2017-2018 Arctic Cat ZR 8000Billet 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.