In order to get more power the key to any high-performance engine is you must get more air and fuel in.  To accomplish this you must maximize cylinder fill with the added efficiency of performance headwork. 

Below is a guide for our performance head packages to upgrade your Harley-Davidson Evo, Sportster, or twin cam.



HEAD PACKAGES for 1999-2017 88-103 Harley Twin cams
TDG Level 1+ CNC Headwork  $650
A comprehensive performance upgrade for the budget minded individual that offers added performance and efficiency.
  -Heads thoroughly cleaned and inspected
  -Valve springs tested
  -TDG CNC & Velocity porting
  -Heads gasket sealing surface machined for proper head gasket sealing surface

-85cc volume
  -Proprietary Valve and seat work
  -Pressure Tested & assembled with new valve seals
  -Manual Compression release Valves and machining $100 additional
 

TDG Level 2+ CNC Headwork  $980.00
The Level 2 head package offers you the added ability to make use of higher performance camshafts with lifts up to .650  Perfect for the touring rider and those looking for all around performance enhancement.
  -Heads thoroughly cleaned and inspected
  -TDG CNC & Velocity porting
  -New Stainless Steel Over sized valves 1.900 intake-1.575 exhaust
  -High Quality AV&V Beehive valve springs (.600 lift)
  -Heads gasket sealing surface machined for proper head gasket sealing surface
  -Proprietary Valve and seat work
  -Pressure Tested & assembled with new valve seals
  -83cc matched combustion chambers
  -Manual Compression release Valves and machining $100 additional
 

TDG CNC Eliminator series heads for 2005-2017 Air cooled 88-103ci Twin cam  $1380

TDG's CNC Eliminator Heads offer the performance enthusiast maximum performance cylinder heads to be proud of.  Your friends will get small very quickly in your rear view mirrors!
  -Heads thoroughly cleaned and inspected
  -TDG Proprietary CNC Porting including CNC Combustion Chamber shaping
  -1.800 intake port for use with 58mm or larger intake manifolds
  -New Stainless Steel Oversized valves 1.980 intake-1.630 exhaust with 5/16 stems
  -Larger Intake Valve seat installed
  -5/16 Bronze Manganese valve guides Installed
  -High Quality AV&V Beehive valve springs (.650 lift)
  -Heads gasket sealing surface machined for proper head gasket sealing surface
  -Proprietary Valve and seat work
  -Pressure Tested & assembled with new valve seals
  -87cc matched combustion chambers
  -Manual Compression release Valves and machining $100 additional

***Special note-These heads can not be used with cams that have larger than .235" TDC overlap lift***