What is so great about “Porting by Hand” verses CNC porting? The ports have changed, the parts are different and the machines / tooling used to perform the work are improved. New guides are provided on all but the “Blueprint” packages and flow sheets provided again for all packages except the “Blueprint”. Our current “Street Pro” package for example performs equal or better than the original “Pro Street” head work and does that at a greatly reduced price. I have done flow development and dyno testing and changed the product to better align with the market and riders needs. Why the name change from Head Designs by Dewey?Īfter 6 years in business simply stated our product is very dissimilar to the original Deweys product. A small percentage of what we do is serious performance work for the riders that want to enhance the power beyond just a better torque curve. Most of our customers are interested in just fixing the torque curves so the bikes have a much better feel of power stop light to stop light or on the road passing a truck or in similar situations. They come from the factory in a very detuned state and with some sensible upgrades they can provide a much more enjoyable riding experience.

We want to help riders put the fun into these motorcycles. What method should I use to ship my heads?.How should I pack my heads for shipping?.Should I remove any parts from my heads before shipment?.I’ve seen cheaoer porting services, what makes yours worth the money?.Do you offer any type of “Tech Support”?.What other services do you provide? Can you Bore and Hone cylinders?.How long will HD Street Performance have my heads?.What thickness head gasket should I use?.What about corrected geometry, what is it and why use it?.When are compression releases recommended / required?.Which porting option is best for my style of riding?.How much power will your heads make on my bike?.What is so great about “Porting by Hand” verses CNC porting?.Why the name change from Head Designs by Dewey?.What is HD Street Performances’ mission?.

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