The RACER PRO 15 degree cylinder head is a rolled over version of the 18 degree head that uses all the same components ( valves manifold etc ) but with added advantage of a smaller combustion chamber (volumes in mid 40's can be achieved ) RACER PRO 15 degree head are available in the same port sizes as the 18 degree head with an 'as cast' chamber of around 54 cc RACER PRO 15 degree heads are available CNC ported in a number of port sizes to suit your application.


  • Combustion Chamber - 54cc
  • Intake Port Volume - 226cc - 254cc
  • Intake Valve Size - 2.180" - 2.200" X 5.560" Long
  • Exhaust Valve Size - 1.600" - 1.620" X 5.560" Long
  • Head Gasket - Cometic Pn 350-C5399 400-C5403
  • Head Studs - Arp Pn 234-4721
  • Spark Plugs - 14 Mm ¾ Reach Gasketed
  • Spring Seats - 1.550" may be cut to 1.657" no bigger .040" deeper no more
  • Valve Spacing - 18 Degree Chev
  • Rocker Arms - Yella Terra Pn. Yt-6378 T&D Pn. 2053-2055
  • Intake Gasket - Fel Pro Pn. 1282
  • Exhaust Gasket - 18 Degree Chev
  • Most Popular Manifold - Edelbrock Pn.2995 Tunnel Ram RACER PRO
  • Horse Power Range - 630 - 750

RACER PRO 15 degree flow chart 226cc port

Flowed @ 28" Moderate porting 2.150 inlet valve 1.6" exh valve 4.125" bore

LIFT 200 300 400 500 600 700
INLET cfm 152 218 275 318 325 345
EXHAUST cfm 126 175 235 262 275 280

RACER PRO 15 degree flow chart 254cc port

Flowed @ 28" Moderate porting 2.180 inlet valve 1.6" exh valve 4.125" bore

LIFT 200 300 400 500 600 700
INLET cfm 156 222 280 330 356 362
EXHAUST cfm 128 175 238 262 275 280

 

 

Price: AUD $1870 inc. GST + frieght

 

Racer Pro produces alloy castings for some of Australia's leading after market performance manufacturers, including cylinder heads for Chev, Holden and Ford, alloy cylinder blocks for 4-cyl, 6-cyl and V8's. Inlet manifolds for Chev, Holden and Ford. Valve covers, superchargers, turbo charger manifolds etc.

You name it and we probably have cast it!