Description
The CP Carrillo CPN-3957 represents maximum oversize ring technology for Sea-Doo 4-TEC engines bored to 100.50mm (0.50mm over). Specifically matched to CP pistons M9041, M9042, and M9066, this ring pack survives extreme cylinder pressures in high boost racing applications. Gas nitrided top ring construction with taper hook second ring technology provides sealing that lesser rings simply cannot match.
Designed for the ultimate 0.50mm overbore rebuilds, CPN-3957 maintains perfect gap control through thermal expansion cycles while delivering zero oil consumption. The 1.0/1.2/2.8mm configuration represents decades of racing development specifically for marine supercharger applications. Per cylinder packaging ensures precise quantity control for professional engine programs.
- Precision fit 100.50mm bore CP Carrillo pistons M9041/M9042/M9066.
- 1.0mm gas nitrided steel top ring for detonation and heat resistance.
- 1.2mm taper hook groove Napier for superior oil metering performance.
- 2.8mm flex vent oil ring eliminates consumption in marine conditions.
- Sold per cylinder – 3 cylinder engines require quantity of 3 sets.
- Championship proven in maximum boost Sea-Doo 4-TEC racing.
When rebuilding to maximum oversize with high boost intentions, CP Carrillo CPN-3957 rings are non-negotiable. They provide the sealing foundation that separates race winners from also-rans in bracket racing and heads-up competition.
