Pro Design PD307 Cool Head Dome - Standard Bore (21cc) control-throttle-tubes Compatible with most stock and

Compatible with most stock and aftermarket 4- and 6-piston calipers

Maximum Engine CC 80 Street

Bore - Actual: 80

Replaces OEM #17054-99X (

2002 KTM 520 SX

Pro Design PD307 Cool Head Dome - Standard Bore (21cc) control-throttle-tubes Compatible with most stock andBillet 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.