GSXR 1000 K3 K4 Race Track Cylinder Head Kent Crescent High Compression Ported. Ported and gas flowed head. Crescent titanium retainers IN. Kent race cams SUZ31 and D1148. PTV clearance to check when fitting. The D1148 cam lift is 8.0mm and the duration at 1mm with zero clearance is 256°. Cam Lift (mm) 10.23mm Inlet / 8.45mm Exhaust. Duration at 1mm 258 Deg Inlet / 236 Deg Exhaust. Full Lift Inlet 105 Deg ATDC/Exh 105 Deg BTDC. LTDC 3.20mm Inlet / 1.61mm Exhaust. Valve Lift (mm) 9.98mm Inlet / 8.20mm Exhaust. VC (mm) 0.25mm Inlet / 0.25mm Exhaust. This item is in the category “Vehicle Parts & Accessories\Motorcycle Parts\Other Motorcycle Parts”. The seller is “1student_nurse” and is located in this country: GB. This item can be shipped to United Kingdom.