Sinister Line of Performance Engine Kits are Launching!

sinister107 sellshtExtensive research and development has gone into our new "Sinister" line of engine performance kits. HSS designed CNC cylinder heads performance matched to the best engine components available allow us to offer our customers repeatable and dyno-test proven horsepower for "feel-it-in-the-seat" performance! Sinister V-Twin packages for 103ci, 107ci, 117ci and 124ci displacements are being unveiled this month in Daytona Beach at the 2015 Biketoberfest bike rally!

Stay tuned as we update our web site that delivers detailed information for each of Sinister Engine packages! Click on the Sinister 107 Proof flyer to enlarge!


Engine Performance

Hulten Speed Sports is very excited to announce that after many years of hand porting, flow bench testing, and perfecting our Stage 2 Harley heads, that we are now offering them in a CNC ported versions. Our dyno-proven designs are now available with the consistency that CNC machining delivers. Packaged with other components and Hulten-designed fuel-injection mapping, our CNC cylinder heads take the guess work out of tuning your V-Twin's powerplant and gets you out on the road.

Multiple performance kits will be released this spring. Engine kits designed for your needs!

 Here's The Proof!

HSS CNC Heads on 107ci Dyno Results

Check out the numbers Ray cranked out of a customer's 2011 Road Glide fitted with Hulten Speed Sports' new custom CNC ported cylinder heads! This 107ci Beast cranked out a whopping 123.19 horsepower with an asphalt ripping 133.08 maximum torque! Click on the Dyno Chart above for an enlarged view! So what are you waiting for? Give us a call today and place your order and walk the walk!

Hulten Designed CNC Cylinder Heads

Screamin Eagle vs HSS? It's a No Brainer!

S.Eagle 120 versus HSS 107

What else would you be able to do with an additional $6,000? Well, if you went with a Hulten Speed Sports optimized 107ci powerplant versus a 120ci Screamin Eagle kit from an area H-D dealership, we bet you could think of a whole heck'uva lot of other things that 6 grand could buy!

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