Speedwerx Stealth Cylinder Head

The Speedwerx Cast Head Kit is a performance cylinder head designed to increase compression while retaining the cooling advantages of the OEM head design. Manufactured from an unfinished OEM-style casting, the combustion chamber is machined specifically for improved throttle response, acceleration and power. Multiple compression ratios are available for different riding elevations.

• Performance cylinder head designed to increase compression and performance
• Machined combustion chamber
• Retains the OEM-style cooling design
• Designed for use with 91+ octane non-oxygenated premium pump fuel at the recommended elevation
• No ECU reflash required
• Approximately 0.4 lb lighter than the stock cylinder head
• Up to approximately 1.5 lb lighter than some aftermarket billet head designs
• Reusable O-rings seal the head bolts without requiring silicone or sealant
• Speedwerx reports approximately 3 HP peak gains with additional mid-range gains depending on configuration
• Available in multiple compression ratios for different elevations
• No core exchange required
• Made in the USA