Maximize the lifespan of your 2008-2016 Polaris 800 twin engine with this kit, which also fits the new AXYS. It features custom-made Wiseco forged pistons that are made from a stronger alloy to reduce skirt collapse, as well as titanium nitride-coated rings for faster break-in and longer life. A complete set of eight longer cylinder bolts and two longer dowel pins increase the case volume, resulting in a 2-3 hp gain.
Cost: $500
More info: www.hansonracingengines.com