Description
The Bonneville Performance High Performance Head is available for 2001 thru 2014 Bonneville, Thruxton, America, Speedmaster and Scrambler motorcycles. We offer 1mm and 2mm larger valves with our hi-flow performance heads. A stock Triumph Bonneville head flow is 181 cfm. Our 1mm hi-flow head increases the head flow to 236 cfm and our 2mm over head increases the flow to 256 cfm.
Alonzo –
Bill’s heads are brilliant; this head, along with the matching manifolds and his cams have given me a new engine.
My bike is now a certified Hot Rod, but is as streetable as a stock bike.