If you’re looking to give your Harley-Davidson Twin Cam that extra oomph when you twist the throttle, the crew at Feuling Parts have achieved some substantial gains with its line of Reaper Camshafts. The Reaper features plenty of grind options to work for your riding style, from a nice gain in performance over stock to balls-to-the-wall racing and beyond.
The Reaper chain-driven camshafts are available in five different grinds for 2007-2017 Harley-Davidson Twin Cam engines (which also includes 2006 Dyna). If you’re looking for something a little more subtle, but gives you a noticeable gain over stock, you’ll probably want Feuling’s 525 Reaper Cams. If your goal is improving 1/4-mile times, you might want to check out the 630 Reaper cam. But there are a variety of grinds available in between those two (543, 574, 594) and another option for a specific grind to fit your performance needs no matter what you’re after.
Feuling 525 Cams
The 525 Cam is a real workhorse, designed to increase torque band width and improve fuel economy. The 525 is a great bolt-in camshaft upgrade for stock Twin Cam 88 and Twin Cam 96 engines, but it also performs well in 103ci strokers. The Reaper 525 produces strong low and mid-range power with a linear horsepower and torque curve. It can be used with factory valve springs, pushrods and lifters. Increases throttle response and eases starting. The 525 will also respond well to increased compression and cylinder head work. Optimal rev range for the 525 is 1,750 – 5,500 RPM.
Feuling 543 Cams
The 543 camshaft is known as the Freeway Flyer, a great camshaft for those who want more top-end power than the 525 cam without sacrificing low-end torque. The 543 features a smooth cam lobe layout, which maintains a quiet valve-train and produces a smooth cruise power band. The 543 is a great bolt-in camshaft option for stock to mild Twin Cam 96, Twin Cam 103, Twin Cam 106 and Twin Cam 107 engines and works well in 88ci and 95ci engines. This cam features easy starting, increases throttle response and fuel mileage and it responds well to an increased compression ratio, performance exhaust and a high flow air cleaner. Note: Performance valve springs are required on 99-04 Twin Cam engines and performance pushrods and lifters are recommended but not required (you should go the extra mile and add them anyway). The 543 is Feuling’s go-to cam for 96ci and 103ci engines. Optimal rev range for the 543 is 1,900 – 6,000 RPM.
Feuling 574 Cams
The Reaper 574 produces a wicked power band for modified engines and is an excellent bolt-in for stock Twin Cam 96, Twin Cam 103 and Twin Cam 110 engines. This is a great all-around camshaft with solid low-end performance and mind-blowing mid- and top-end power. The 574 features an extremely smooth cam lobe design to create a very smooth valve-train motion. The 574 also responds very well to modified cylinder heads, increased compression ratio, performance exhaust and intake systems. Note: Performance valve springs are required on 99-04 Twin Cam engines and performance pushrods, lifters and clutch are highly recommended. Optimal rev range on the 574 is 2,100 – 6,500 RPM.
Feuling 594 Cams
The 594 Reaper Cam is a fierce performing camshaft for an array of engines sizes, large displacement Twin Cam 103, Twin Cam 110 and Twin Cam 124 engines looking for a superior torque band with excellent horsepower gains in heavy bikes as well as smaller, high-revving 95ci engines in lighter bikes. Large displacements respond well to increased compression ratio and smaller displacements will require it. Note: The 594 cams require high performance valve springs, pushrods, lifters, carburetor and or throttle body work, performance exhaust, intake and clutch. Optimal rev range for heavier bikes is 2,200 – 6,250 RPM. For 95 style engines found in lighter bikes the optimal rev range is 2,500 – 6,800 RPM.
Feuling 630 Cams
The 630 Reaper is a beast. Offering vicious power gains, wide streetable power band from a high-lift profile camshaft for high-performance engines with highly modified cylinder heads and compression ratio. The 630 maintains low-end performance with eye-blurring mid- and top-end power. Note: High-performance valve springs, pushrods, lifters and clutch are required as well as carburetor and/or throttle body work is also required along with a performance exhaust and intake system. Optimal rev range for the 630 is 2,500 – 6,900+ RPM.