4. Glasswool Exhaust Megaphone - Megaphone exhaust with Glasswool
5. Competition Valve and Spring Set (EFI) 500cc - 90273 - This uses the standard 500 size inlet valve. Sourced through Hitchcocks Motorcycles, UK.
6. Performance Cam and Push Rod Set - Sourced through Hitchcocks Motorcycles, UK. These need to run with power commander and the appropriate map.
Optional - High Performance Engine Bearings Set can be purchased seperately to increase the engine performance further!
Classic 500 (EFI) Stage Two Performance Upgrade Kit