Welcome to

Atwood Performance

"your Harley Davidson cylinder head porting specialist"

     Atwood Performance is a company dedicated to the performance improvements of your Harley Davidson V-twin engine. All good engine builders know that the cylinder heads of any four stroke, gasoline powered, naturally aspirated engine, are the key foundation component to building horsepower. Cams, compression, headers, timing, fuel delivery, carburetors, throttle bodies, all these other supporting components must be matched to maximize the potential of your cylinder heads. It is the ability to flow air through the internal cumbustion engine that makes it possible to produce power, and it is in direct proportion to CFM that the power level of that engine is based upon. If the cylinder head air flow (cfm) is inadequate, there is no way to make the power, period. Atwood Performance offers different levels of air flow potential to match the demands of each's individual build and power requirements. Simply look over  the power packages offered by Atwood Performance and select the one that meets your demands.

     No one else in the industry offers the level of performance offered by Atwood Performance for anything in its price and quality range.

     Attention to detail, not mass production, is what sets Atwood Performance apart from the competition. Precision workmanship, combined with the best parts available on the market, will have your bike running at performance levels that were once only imagined possible with a Harley Davidson motorcycle.