SkiDoo 600SDI single pipe comparison, head modification

Tested stock and with HotRod Sled Shop reflashes, new Jaws exh w/ stock ECU and HRSS Jaws reflashes

Pump gas stock evaluation compared to Jaws, and HotRodSledShop reflashes for both exhaust systems

pump gas, 100 octane and 114 octane tunes for trail riding or lake racing.