FEULING PARTS Head Bolt Kit Harley Davidson XL / XLCH / XLH 900-1000cc 57-73

Feuling Parts is a U.S.-based performance-engine parts company established in 1974 by Jim Feuling in Oceanside, California. Originally an R&D spin-off famed for groundbreaking engine and fluid‑dynamics innovations, it became a standalone performance brand in the early 2000s .

They specialize in a full range of high‑end V‑Twin components—camshafts, lifters, cam-chain kits, oil pumps, fuel injectors, engine covers, and diagnostic tools—all engineered to enhance Harley‑Davidson performance.