Ultimax 3 has evolved into Ultimax Pro Belt features a thicker cross section so more surface area contacts the clutch; this means less slippage over a broader speed range for quicker acceleration New cog design dissipates heat and aids flexibility Cooler running belts mean better performance and longer lasting belts Run cool, run long, run fast with Ultimax Pro This item fits the following applications: 2006-2007 Arctic Cat T660 Turbo Touring 2007 Arctic Cat T660 Turbo Touring LE 2007 Arctic Cat T660 Turbo Trail 2007 Arctic Cat T660 Turbo Trail LE 2006 Arctic Cat T660 Turbo ST