This is the same chaincase Glenn Hall used to power an F-1200 Turbocharged Arctic Cat to a 7.99 second pass @167 mph in a 1/4 mile run on the asphalt. The owner of the sled Jason Iras is a valued customer of Supreme Tool. SIDEWINDER CHAINCASE (PATENT PENDING) All new billet drop in transmission for your diamond drive. A chain case drive that uses Hyvo chain and gears from Polaris. We can now gear from 70 mph to 200 mph just by changing gears and chain the old fashion way! During track dyno testing we found a +10 hp increase to the track just by adding the chain case, and gearing to the same ratio as the Diamond drive. Our chaincase has been tested on the grass and ice with 300+hp nitrous sleds and 400+hp turbo sleds. Our customer Jason Iras has the Sidewinder on his F 1200 TURBO monster and is running 4.80 seconds in 660 feet. We are very confident and pleased with the performance and longevity of the Sidewinder chaincase. The unit shown above will only fit the 07-09 F-sled and has to be used with a 13.5 wide track. We are currently working on a new chain case that will fit the 07 thru 09 Crossfire and will accommodate the 14" wide track. STAY TUNED!