Active filters
Complete set of top, second, and oil control rings for two pistons.
Barrel-face top rings; reverse torsional second rings; three-piece oil control rails for reliable oil control and sealing.
Two rings per groove; follow piston instructions for correct ring end gap.
- Includes top, second, and oil control rings.
- Top rings barrel face; second rings reverse torsional taper face.
- Three-piece flex vent oil control rings for positive oil control.
- Made in the USA; includes enough rings for two pistons; two rings per groove.
- Complete set for two pistons: top, second, and oil control rings.
- Barrel face top rings and Napier second rings with reverse twist for improved sealing.
- Three-piece Flex Vent oil rings with four steel rails and two expanders for positive oil control.
- Made in the USA.
Complete replacement piston ring set including top and second compression rings plus three-piece oil control rings. Includes rings for two pistons; made in the USA.
Complete kit with top and second compression rings plus three-piece oil control rings; includes rings for two pistons.
Converts '99-'06 Twin Cam engines (except '06 Dyna Glide) to roller-style cam chains and hydraulic adjusters. Requires additional '07-'17 components; a list is included. Made in the USA.
Computer-designed, heat-treated alloy-steel cams. Four-gear set required for installation; installer must verify coil bind and valve clearances.
- Computer-assisted cam design for precise timing
- Alloy steel billet construction with heat treatment
- Made in the USA
- Four-gear set required; installer must verify clearances
Computer-aided cam design; alloy steel billet construction with heat treatment. Made in the USA. Requires four-gear set; installer must verify clearances prior to final assembly.
Fits 1966–1984 Big Twin engines (except 1980–1981). Increases mid-range and top-end power; idle is unaffected. Check spring travel and clearances on 1980+ models.
Bolts into 1966–1984 Big Twin engines (except 1980–1981); increases mid- and high-rpm power while preserving idle.