91-99 Sportster, 97-99 M2, 97-98 S1, 97-99 S3, 99 X1
Designed for high-performance. Won’t collapse at high RPM. The performance of a solid lifter combined with full compensation for heat expansion. These tappets are coated with a special di cro nite DL-5 coating, and hand-fitted to achieve a running fit of .0002" to eliminate hydraulic tappet collapse.