D&D has come up with a tuner 1 shim kit for the Arctic Cat 07-09 F8/M8/Crossfire 800/Crossfire R 800. Best power gains for your money. This kit is designed to run with 92 octane and can be used without a boondocker. The kit will come with spacer plates, base gasket, two degree timing key and head exchange program. This Dyno run was done with our D&D Y-pipe - total package price with D&D Y-pipe is $398. Shim kit only including head exchange $249 part number 300-0500.