Manley Street Strip stock diameter valve springs for 3V SOHC 4.6 and 5.4 engines. Manley valve springs are wound from super clean alloy. Each design minimizes stress to ensure long service life with high lift camshafts. Retainers are manufactured in our own double spindle CNC machines to exacting tolerances and precise installed height specifications.

 

NEXTEK VALVE SPRINGS

Part No. Description Max Valve Lift O.D. I.D. Installed/Open Pressure Retainer #   2 Valve Stock Diameter Single Conical Ovate Wire 221427-16 Ford 4.6L, 5.4L SOHC Street/Strip Applications .580" 1.020" Top 1.125" Bottom .642" Top .748 Bottom 95 @ 1.680" 240 @ 1.130 23627-16 23667-16 (+.060") 221437-16 Ford 4.6L, 5.4L SOHC Ideal for Boosted Applications .580" 1.030" Top 1.175" Bottom .642" Top .787" Bottom 125 @ 1.680" 265 @ 1.130" 23627-16 23667-16 (+.060")   3 Valve Stock Diameter Fully Polished Single Conical 221429-24 Ford 4.6L, 5.4L 3 Valve Street/Strip Applications .500" .880" Top 1.025" Bottom .565" Top .710" Bottom 95 @ 1.670 230 @ 1.170 23628-24   4 Valve Stock Diameter Single Conical Ovate Wire 221434-32 Ford 4.6L, 5.4L DOHC High Performance Street/Strip .525" 1.016 Top 1.126" Bottom .640" Top .750" Bottom 95 @ 1.420 260 @ .920 23627-32 23667-32 (+.060")