Feuling HP+ 543 Hydraulic Conversion Camchest Kit For Harley Twin Cam Features: Bulletproof your engine with maximum reliability 25-35 degree cooler engine temperatures 15-30 degree cooler oil temperatures 15-30 more pounds of oil pressure More power Quieter and smoother engine operation Eliminate wet sumping, blow by and oily air cleaners 543 Cam Info: 543 cams, also known as The Freeway Flyer, a great camshaft for those who want more top end power than our 525 cam without sacrificing low end torque. Extremely smooth cam lobe layout maintains quiet valvetrain and produces the smoothest cruise power band available. Excellent bolt in camshaft for stock to mild 96 and 103 engines and works well in 88 & 95 engines. This cam is easy starting, increases throttle response and fuel mileage. Responds well to increased compression ratio, performance exhaust and a high flow air cleaner. Performance valve springs are required on 99-04 engines and performance pushrods and lifters are recommended but not required. RPM 1,900-6,000 Intake open/close 15/43 Exhaust open/close 56/12 Intake duration 238 Exhaust duration 248 Intake Lift .543 Exhaust Lift .553