WebFeb 15, 2011 · The company’s Type #4 heads ($950) feature a bathtub chamber design and a porting and polising treatment that flows air more freely and unobtrusively. Air/fuel flow imporves and the smaller combustion chamber causes higher compression and more power. Also larger valves and valve seats are added which also help the heads flow more … WebBig Boyz Street Heads. Price Starts at $299. Big Boyz Head Porting is taking a different approach to Harley-Davidson HEAD PORTING. Over the last 15 years I have used many different combinations of components and port …

Harley Heads CNC Porting Service - Zippers Performance

WebAfter our Performance Prep Modification your heads will be superior “mechanical condition” to run 7,000 rpm for a few thousand laps. Note: 7,000 rpm for a few thousand laps will not happen with off-the-shelf warehouse heads without this type of work. Performance Prep is done to all our heads prior the more extensive modifications like SST ... nutritional workup

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WebHead Porting and Dyno Tuning are our specialties. Twin Cam, EVO, EVO XL, Buell and aftermarket heads. Complete port jobs starting at just $299. Our heads offer the best … WebOutlaw CNC cylinder head porting. Fuel Moto Street Outlaw cylinder heads are designed for maximum horsepower & torque in high output applications and are based on S&S Super Stock castings. FM Outlaw heads are fully … Web1.1M views 2 years ago #Hagerty Engines need air (and fuel and spark). Moving air efficiently through the combustion chamber has a huge effect on power and porting your heads is one the best... nutritional white rice