High Performance Head

(1 customer review)


Bonneville Performance offers our hi-flow performance heads with new 1mm and 2mm larger valves included with the porting. NOTE: Customer’s head is required to complete this project and product. Shipping your head to us is not included. A $52.00 USD Shipping & Handling fee (for shipping from us to customer) is automatically added when checking out. Use the Contact Form to email us about international shipping costs and options.

The Bonneville Performance High-Performance Head is available for 2001 thru 2015 Bonneville, Thruxton, America, Speedmaster, and Scrambler motorcycles. We offer 1mm and 2mm larger valves with our hi-flow performance heads.

Additional information

Select Size

1mm over, 2mm over


904, 995, 1100, 1200

1 review for High Performance Head

  1. 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.

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