Replay F1 mirror diameter 8 reversible white long stem

Made from stress-free tapered oval-section wire, with nitrided surface heat treatment, surface enhancements by shot peening and Nano Peen™ polishing Uses a much smaller and lighter retainer spring to reduce valve weight and offer faster revving and smoother movement Designed to handle the highest demands of high-performance engines with fast-lift cams Allows the use of camshafts up to 0.750" lift; no valve cover machining required Extremely high fatigue resistance level Track tested and dyno proven The kit includes High-Load BeeHive® valve springs, micro-polished lightweight Ti-17 alloy 10° titanium retainers for increased lifespan, heat-treated machined chromoly spring seats, shims, valve locks and a premium Viton® seal kit with spring-loaded scraper system Made in the USA Seat load/installed height: 170 lb at 1.935" (0.720" lift) 185 lb at 1.900" (0.685" lift) 200 lb at 1.845" (0.630" lift) 208 lb at 1.819" (0.604" lift) 215 lb at 1.800" (0.585" lift) 217 lb at 1.789" (0.574" lift) 415 lb at 1.215" open height Maximum compression at 1.125" Valve springs must be installed at the correct open height, matching the maximum lift and open height specification. The Feuling® BeeHive® valve spring kit is a direct replacement requiring no machining or modification of the rocker cover. Up to .574" lift for Big Twin '84-'04 and XL '86-'03, up to .700" for Twin Cam '05-'17. Larger camshafts require machining of the valve guides for seal clearance.