WebWelcome to HD Street Performance, formerly Head Designs by Dewey We are dedicated to performing head porting and supplying engine packages for HD motorcycles. Our goal is … 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 …
Zipper’s Stage III ThunderSport CNC ’04-Up XL/XR1200® Heads
http://www.hammerperf.com/xlporting.shtml 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 ... gog galaxy for windows 10
CNC HEAD PORTING - HAMMER PERF
WebPerformance CNC Ported Cylinder Head Upgrade For Harley-Davidson Milwaukee-Eight. Product No. #EMP-0083. Our performance CNC cylinder head upgrade service has been … WebApr 30, 2012 · The ultimate video on increasing horse power for your Harley Davidson Porting heads CONTACT: [email protected] our 4 part Interview with Harley le... gog galaxy change game location