WebThese ThunderSport heads will allow your Sportster® engine to reach its full potential! • Full CNC port & combustion chamber machining • Ductile iron step-lock valve guides with Viton seals • Competition seat work on Serdi equipment • 1.900” Intake, 1.615” Exhaust stainless steel valves • Performance valve springs with titanium collars WebSep 17, 2024 · Harley-Davidson heads can be ported and polished to improve performance. This process can be done at home with the proper tools and a little know-how. Porting …

Porting cylinder heads to optimize engine performance Hagerty DIY

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 … 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 … sims 4 edit residential lot

Super Port Flow - FLO Headworks

WebSep 20, 2013 · To port cylinder heads with a CNC machine, you need a machine with 5-axis capability. A 5-axis machine can move the head and tooling to reproduce all of the complex moves it takes to completely machine intake and exhaust ports. 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 ... WebThe head diameter has been increased by 20 percent to 1.687" on the exhaust and 1.937" on the intake. Valve stem clearance is fit to .001" on the intake and .002" on the exhaust. This high performance cylinder head modification package includes: rbs bankline security