Duncan Racing's Complete 440cc Engine Performance Package for the Honda 400EX

Includes:
Fat Boy 4 Complete Exhaust System, 440 piston kit-sleeve-steel head gasket (installed), Camshaft, HD Valve Springs w/Titanium Retainers, Shortened Bronze Guides, DR Head Porting (with guides out), 3-Angle Valve Job, Edelbrock Carburetor Kit, Instructions, DR Tech Support.

Kit Options:
Camshafts-Low End Cam or Mid/Top End

Compression: 10-1, 11-1, 12-1, 13-1

Customer Cores Required:
Cylinder, Head, Camshaft for modification. (or purchase new cores)
Kit Price is plus any OEM parts.
**For more Engine Kit options check the Buyers Guide section**