07-09 Yamaha WR450F WR 450F 98mm Big Bore COMETIC Top End MLS HEAD Gasket MX USA Yamaha Raptor 660 KPMI Black Diamond stainless steel

KPMI Black Diamond stainless steel intake and exhaust valves

Designed for OEM bore engines

Wiseco HD clutch kit

Less rigid than chromoly

07-09 Yamaha WR450F WR 450F 98mm Big Bore COMETIC Top End MLS HEAD Gasket MX USA Yamaha Raptor 660 KPMI Black Diamond stainless steelCometic Top End 98mm Big Bore Head Gasket Fits Yamaha YZ450F Dirt Bikes Years 2006 2007 2008 2009 ONLY Fits Yamaha WR450F 2007 2008 2009 2011 2012 2013 2014 Fits Yamaha YFZ450R & YFZ450X Fuel Injected Models ONLY Years 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 PART NO: H2477SP1027S (Same Head Gasket Used in C3178, C3279, C3178 EST, C3279 EST Top End Gasket Kits) UPC NO: 191070032715 Replaces Yamaha OEM Part# 2S2