Feuling, Econo Beehive valve spring kit. .585" lift - 84-99 Evo B.T.; 99-04 Twin Cam; 86-03 XL (NU) 519496 Note: Use with 911368 Boomerang

Note: Use with 911368 Boomerang pulley guard (must be ordered separately)

25" wide x 5

Sold in a 4-pack

Note: On 53-E76 engine cases you will need a tappet screw conversion kit threaded for early style cases (502990 allen head or 513555 acorn)

dimensions: 12cm rise x 71cm wide x 11cm pullback

Feuling, Econo Beehive valve spring kit. .585" lift - 84-99 Evo B.T.; 99-04 Twin Cam; 86-03 XL (NU) 519496 Note: Use with 911368 BoomerangInstalled pressure 183lbs@1. 760", open pressure & height 380lbs@1. 250", coil bind@1. 180". Direct replacement, installs without machining or rocker box clearancing. High tensile chrome silicone wire with a shot peened heat treatment and a super NexTex finish. Kits include springs, lower & upper collars, shims, keys and Viton seals. Compatible with stock 5 16" (7. 94mm) diameter valve stems.