Description
The CP Carrillo M9066 forged piston kit is engineered for Sea Doo RXP 300 and other 1630 Ace engines requiring a substantial 0.50mm oversize bore while maintaining an 8.45 to 1 compression ratio. With a 100.50mm bore and 69.2mm stroke, displacement increases to approximately 1646cc, providing extra breathing capacity alongside a complete cylinder refresh. This low compression spec is perfect for maximum boost applications where detonation control and cylinder pressure management are critical.
Each M9066 piston is designed to pair with rod 9086, 866 2250 20CP3C wrist pin, 866×063 SWL locks, and CPN 3957 ring set. The forged construction features heavy duty ring lands, a reinforced crown, and skirt geometry optimized for high load stability. This combination gives the short block the toughness needed for extreme supercharged performance and sustained wide open throttle operation.
- Application Sea Doo RXP 300 and 1630 Ace engines bored to 100.50mm 0.50mm oversize.
- Compression ratio 8.45 to 1, ideal for high boost supercharged builds with race fuel and advanced tuning.
- Forged oversize pistons restore heavily worn cylinders and provide race level strength.
- Matched with 9086 rod, 866 2250 20CP3C pin, 866×063 SWL locks, and CPN 3957 rings for complete reliability.
- Built for extreme cylinder pressure, heat, and rpm with strong ring seal and crown integrity.
- Perfect foundation for competitive Sea Doo 300 race engines and maximum power street/strip builds.
For Sea Doo 1630 Ace projects that demand a half millimeter overbore and forged pistons capable of surviving maximum boost, the CP Carrillo M9066 kit delivers unmatched durability. It creates a bulletproof short block foundation for the highest levels of personal watercraft performance.





