Feuling Motor Company A/C Flow Restrictors

Feuling Motor Company: Engineering Excellence for the American V-Twin

Few names in the Harley-Davidson performance world carry as much weight as Feuling Motor Company. Founded and headquartered in Oceanside, California, Feuling has built a reputation as a true “skunk works” facility — the kind of operation that major manufacturers trust when they need innovative, precision-engineered solutions. With a history of collaborative development alongside industry titans like Ford, General Motors, and Harley-Davidson itself, Feuling has earned its place at the top of the V-Twin performance parts landscape.

What truly sets Feuling apart is its deep, focused expertise in the internal workings of Harley-Davidson engines. Rather than offering a broad catalog of cosmetic accessories, Feuling concentrates on the components that make an engine breathe, circulate oil, and generate power more efficiently. The result is a lineup that serious builders and performance-minded riders turn to when reliability and horsepower are both non-negotiable.

The Oiling System: Where Feuling Made Its Name

Feuling’s reputation was largely built on its revolutionary approach to engine oiling. Their engine oil pumps — available in OE+, HP+, and Race Series configurations — are widely recognized as some of the most capable billet oil pumps available for Twin Cam and Milwaukee-Eight engines. The OE+ pump alone is engineered to deliver significantly more pressure volume and scavenge volume over the factory unit, helping to stabilize oil pressure and reduce operating temperatures even under demanding conditions. For riders who want a comprehensive oiling system overhaul, Feuling also offers full oil pump kits that pair the pump with a billet camplate for a complete, matched upgrade.

Timing Components Built for Performance and Longevity

A healthy oiling system is only part of the equation — the camchest is where Feuling’s engineering truly shines as a complete system. The brand’s engine timing chains are precision-spec components designed to work in concert with Feuling’s camplates and tensioner hardware. For riders dealing with older Twin Cam engines that still rely on mechanical spring tensioners, Feuling’s engine timing chain tensioner kits offer a well-regarded upgrade path — converting early ‘99–’06 style mechanical systems to the more reliable late-style hydraulic cam chain drive system. These comprehensive kits include billet hydraulic tensioner housings, tensioner pads, cam chains, sprockets, bearings, and all necessary hardware, making them a favorite for professional builders performing full camchest refreshes.

Performance Camshafts Engineered for the Real World

Feuling’s engine camshafts are developed with the same philosophy that drives every product in their lineup: measurable performance gains without sacrificing street-friendly driveability. Available in profiles tuned for specific engine platforms and power goals, Feuling cams are designed to work seamlessly with their oiling system components — ensuring that valve timing improvements are backed by the oil flow and pressure needed to support them.

Made in the USA, Proven on the Salt Flats

Feuling’s commitment to domestic manufacturing and rigorous testing isn’t just marketing copy. The brand has achieved multiple world land speed records, including benchmarks set with Harley-Davidson-based powerplants — and Harley-Davidson has licensed Feuling technology for use in its own V-Twin engines. Whether you’re refreshing a high-mileage touring bike or building an all-out performance engine, Feuling Motor Company parts deliver the engineering depth and real-world durability that the American V-Twin deserves.