Wiseco SK1212 Top-End Rebuild Kit for Ski-Doo 537 Engine/ Formula 521 - 72.50mm feed-mpn-PWRWC-Y03-500 Our ESG143 stator offers a

Our ESG143 stator offers a flat output across the RPM range and it also runs much cooler than the stock stator

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Wiseco SK1212 Top-End Rebuild Kit for Ski-Doo 537 Engine/ Formula 521 - 72.50mm feed-mpn-PWRWC-Y03-500 Our ESG143 stator offers aWiseco Performance Top End Rebuild Kit Part Number: SK1212 Piston Size: 72. 50mm These kits contain everything you need to complete your rebuild the right way, the first time High Performance ring kit and alloy pin included with each piston kit for extended life and sustained power. Dedicated forgings used for superior strength to weight ratio utilizing aerospace alloy. All Piston Kits are precision crafted and forged in the USA Wiseco's complete Top