Top End

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersCylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noiseNickel Silicon Carbide plated for long...

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersCylinder kits include matched Vertex pistons to ensure longevity, performance and reduced engine noiseNickel Silicon Carbide plated for long...

Made from premium Viton material and offers superior oil controlExhibit the least amount of parasitic drag and wear on the valve, giving greater life of the valve and better powerFit OE valve and valve guide dimensions for many applications Kawasaki --...

Made from premium Viton material and offers superior oil controlExhibit the least amount of parasitic drag and wear on the valve, giving greater life of the valve and better powerFit OE valve and valve guide dimensions for many applications Honda --...

Made from premium Viton material and offers superior oil controlExhibit the least amount of parasitic drag and wear on the valve, giving greater life of the valve and better powerFit OE valve and valve guide dimensions for many applications Honda --...

Made from premium Viton material and offers superior oil controlExhibit the least amount of parasitic drag and wear on the valve, giving greater life of the valve and better powerFit OE valve and valve guide dimensions for many applications Honda --...

Highest tolerances for correct valve stem support and fitment in cylinder headBuilt from Xceldyne's specified blend of Manganese-bronzeHeat dissipation (thermal conductivity) and valve stem lubrication are substantially increased, which leads to extended...

The ultimate in high-performance valves for the serious engine builderNo compromise designHigh-flow design includes a 50 degree seat angle, no dish valve face and 5mm stem diameter (intake and exhaust) for better flow, higher compression and higher...

The ultimate in high-performance valves for the serious engine builderNo compromise designHigh-flow design includes a 50 degree seat angle, no dish valve face and 5mm stem diameter (intake and exhaust) for better flow, higher compression and higher...

Made in the U.S.A.Be sure to use race fuel with some applications Polaris -- Sportsman 800 EFI 4x4 -- (2010, 2008, 2012, 2009, 2013, 2014, 2011); Polaris -- RZR 800 4x4 -- (2009, 2011, 2012, 2010, 2014, 2013, 2008); Yamaha -- YXZ 1000R -- (2016, 2017,...

Made in the U.S.A.Be sure to use race fuel with some applications Yamaha -- Raptor 660R 4x2 -- (2003, 2002, 2005, 2004); Yamaha -- Raptor 700R 4x2 -- (2010, 2008, 2006, 2012, 2015, 2007, 2009, 2011, 2013, 2014); Yamaha -- YXR 660F Rhino 4x4 -- (2004,...

Made in the U.S.A.Be sure to use race fuel with some applications Polaris -- RZR XP 1000 4x4 -- (2014, 2016, 2020, 2015, 2017, 2019, 2018); Polaris -- RZR XP 900 EFI 4x4 -- (2014, 2013, 2011, 2012)