Complete high performance cylinder head assembly for your Yamaha SHO engine delivers maximum airflow for significant performance gains. OEM Yamaha head casting is CNC-ported and machined to accept +1mm RIVA High Performance Valves. Head is assembled with our high quality viton seals and Valve Train Upgrade Kit featuring titanium retainers and racing valve springs. Cam shafts, valve lifters (buckets) and shims sold separately. Key Features: CNC-Ported (for increased air flow), +1mm Oversize Intake Valves (high grade stainless), +1mm Oversize Exhaust Valves (inconel), RIVA Performance Viton Valve Seals, RIVA Valve Train Upgrade Kit (Includes racing valve springs & titanium retainers.), Precision Assembly & Vacuum Tested. RY10040-RHA-P1, Race Head Assy, YAM FX-SHO/FZ $ 4,299.95
