MCS-906645 - .490" valve lift. Bolt in. Can be used with stock and modified 883; 1100 and 1200 Sportster engines. Slightly higher idle but suitable for stock springs and lifters. 2000-6000 RPM powerband. Fitment: 91-99 XL(NU)

MCS-906640 - .465" int. & .482" exh. valve lift. Bolt in. Can be used with all stock 883; 1100 and 1200 Sportster engines. Longer duration and higher lift provides increased power from 2000-6000 RPM. Suitable for stock springs and...

MCS-572143 - Standard replacement drive ratio. Fitment: 18-21 Softail; 17-21 Touring

MCS-572141 - Power pulley. 3% more rpm. Improves low speed strength; ideal for hauling sidecars and heavily loaded dressers. Fitment: 18-21 Softail; 17-21 Touring

MCS-572145 - Requires high-lift valve springs. More lift and duration yields extra HP and torque in the 2200-6500 RPM range Note: The compression release; compression release spring; compression release pivot pin; and the compression...

MCS-572144 - Bolt-in. Higher valve lift and more duration means power from 2000-6000 RPM; stock or modified engines Note: The compression release; compression release spring; compression release pivot pin; and the compression release pin...

MCS-559462 - Requires high-lift springs. Recommended for big inch engines with modified heads (1600-5500 RPM). Note: Bearings; o-rings and hardware are not included. Fitment: 18-23 Softail; 17-23 Touring

MCS-559461 - Requires high-lift springs. Mid-range for 114" engines. Excellent choice for Big Bore kits with higher compression ratios (1500-5700 RPM). Note: Bearings; o-rings and hardware are not included. Fitment: 18-23 Softail; 17-23...

MCS-572140 - Requires high lift springs. M464 cam grind; great mid range torque and power; w/free flow exhaust pipes and injector tuning. Note: Bearings; o-rings and hardware are not included. Fitment: 18-23 Softail; 17-23 Touring

MCS-559460 - Bolt-in. Allround cam to boost power & torque in stock 107" & 114" engines. Also compatible with 117" Big Bore kits with higher compression (1000-5600 RPM). Note: Bearings; o-rings and hardware are not included. Fitment:...

MCS-572139 - Bolt in cam for 107-114 inch engines. Big power 127 ft. lbs and 109 hp (from 1200 to 5500 RPM). Note: Bearings; o-rings and hardware are not included. Fitment: 18-23 Softail; 17-23 Touring

MCS-559459 - Bolt-in. Great for stock compression 107" engines for Touring style of riding. Excellent rapid rising low-end torque curve (1000-5500 RPM). Note: Bearings; o-rings and hardware are not included. Fitment: 18-23 Softail; 17-23...