Recommended for 89in.-100in. engines with 9.5:1 to 11.5:1 compression ratio. Provides best performance from 3500-6500 rpm using ported stock heads or S&S heads. Requires adjustable pushrods and covers, spring spacing or high lift valve springs, and normal clearance checks.
* Pushrods AP-292085
* Covers XL’00-03 CM-2255-36 + CM-2254-2
* Covers XL’04-21 CM-2253-36
* Springs XL’00-03 AV-VSK6000
* Springs XL’04-21 AV-VSK60007SG
