Feuling Conversion Cams For Harley Twin Cam Conversion cams are designed for riders upgrading from the early spring-loaded tensioner system. They feature a hybrid design with 19992006 inner and 20072017 outer cam journals, allowing the use of a later-style cam plate, oil pump, and hydraulic tensioners for improved reliability and performance. Features: 99-06 inner cam journals 07-17 outer cam journals Made in the U.s.a. Cam Info: 525 Cams are a real workhorse, designed to increase torque band width and increase fuel economy. Great bolt in camshaft upgrade for stock 88 & 96 engines also performs very well in 103 strokers. Produces strong low and mid range power with a linear horsepower and torque curve. Can be used with factory valve springs, pushrods and lifters. Increases throttle response and eases starting. Will also respond well to increased compression and cylinder head work. RPM 1,750 - 5,500 543 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 1,900-6,000 574 Cams have a wicked power band for modified engines and an excellent bolt in for stock 103 & 110 engines. Works very well with 95, 106, 107, 114 big bore engines. This is a great all around camshaft with solid low end performance and mind blowing mid and top end power. Extremely smooth cam lobe design creates a very smooth valve-train motion. Responds very well to modified cylinder heads, increased compression ratio, performance exhaust and intake systems. Performance valve springs are required on 99-04 engines and performance pushrods, lifters and clutch modifications are recommended. RPM 2,400-6,500 594 Cams are fiercely performing camshafts for an array of engines sizes, large displacement 103, 110 & 124 engines looking for a superior torque band with excellent horsepower gains in heavy bikes (Rpm 2,200 - 6,250.) Smaller high revving displacement 95 style engines in lighter bikes looking to twist the throttle and tap into some horsepower (Rpm 2,500 - 6,800). Large displacements respond well to increased compression ratio and smaller displacements will require it. 594 cams require high performance valve springs, pushrods, lifters, carburetor and or throttle body work, performance exhaust, intake and clutch. Cam Specs: 525 Cams Intake open/close 4/42 Exhaust open/close 51/5 Intake duration 226 Exhaust duration 236 Intake Lift .525 Exhaust Lift .535 543 Cams Intake open/close 15/43 Exhaust open/close 56/12 Intake duration 238 Exhaust duration 248 Intake Lift .543 Exhaust Lift .553 574 Cams Intake open/close 15/45 Exhaust open/close 61/14 Intake duration 240 Exhaust duration 255 Intake Lift .574 Exhaust Lift .574 594 Cams Intake open/close 19/56 Exhaust open/close 64/16 Intake duration 255 Exhaust duration 260 Intake Lift .594 Exhaust Lift .604