Fits Big Twin Evolution 1984/1999, Twin Cam 1999/2004 and Sportster Evolution 1986/2003 engines
Andrews high lift spring sets are manufactured from the finest quality spring wire, wound and treated to produce the needed pressure for the high lift cams of today
At 1.800" installed height valve seat pressure will be approximately 160 pounds
When installed with a set of Andrews spring collars, cam lifts producing up to .550"+ valve lift can easily be accommodated without machining the heads
Spring set is made of heat treated premium H-11 tool steel
Springs have an installed height of 1.800" creating a valve seat pressure of 180 pounds, and will accommodate cams that produce a valve lift of up to .650"
Fits Big Twin Evolution 1984/1999, Twin Cam 1999/2004 and Sportster Evolution 1986/2003 NOTE: This spring set MUST BE USED with VSC102 spring collar kit