Dan Vance Racing
Evolution Cylinder Heads

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At Dan Vance Racing we offer custom high performance cylinder head and engine modifications for Harley Davidson motorcyles. We have performance kits for every riding style. We can provide torque and horsepower increases in any or all RPM ranges. 

Cylinder Head Porting & Flowing Process

Evolution Power

Starting at:   $895 
                                                                     
                                                                   

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Here we have a set of ported & flowed Evolution cylinder heads. There are different options that can be done to tailor our porting to your riding and parts selection. These are some of my best sellers, but they are not limited to these selections. If you have or want something done a little differently then now is the time to speak up. Our goal is to make your bike perform the way you want it.
T These are the most often used combinations, however there are many choices that will change the outcome of these packages, some might make it better, some might not. I can only attest to what I have used and know the results. I am always willing to try new combinations that would make more power. Your feedback is greatly appreciated.
Options Available:
  • Compression releases: machining and installation of releases.   
  • Milling heads for desired compression.                                           
  • CC heads.                                                                                      
  • Install new valve seat                                                                    
  • Port manifold                                                                                  
  • Roller rockers    S&S                                                                       
  • New exhaust valve                                                                          
  • New exhaust valve guide                                                                

    There are plenty more options available. JUST ASK !!!

                                       
Suggested Performance Combinations:
FLH,FLHT,FLHR MODELS....heavy bikes w/bags, trailers, big people.
      Power Output:      90+ Torque  85-95 hp         
          
      Stage 2 heads, 
      9.8 Piston Kit,
      Andrews 27, cams, Woods #6 or 7, 
      Power Commander USB111
      Good exhaust
     
Sport bikes, Softail, Dyna, FXR

      Power Output:   90-95-torque    90 - 95 HP
      Stage 2 heads 
      10.5 Piston Kit,
      Andrews 51, 7, 72 cams, Woods #7 or 8 , 9       Power Commander USB111
      Good exhaust 
For questions, options & prices please contact me at:  n2ofaster@charter.net 
   
                                                                PROVEN PERFORMANCE !!!
                                               1995 AMI Brute Horsepower Shootout Winner 80" Evolution  110.8 RWHP 
  • First 100+ HP run on a Harley in competition in the country. 
  • I rode this bike to the shootout !!!!! 
This FXR was my personal bike. It a stock motor with the heads flowed by me, an S&S G carb, Supertrapp Exhaust and a Dyna Single Fire ignition. I rode this to the AMI Dyno Shootout !  Check out the Dyno Graph !  It's faded, but the bike keeps going strong!

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