v615X
2.80-3.00in² MIN
45cc and smaller chamber
270-295cc runner*
2.180-2.200 valve
1.580-1.600 exhaust
50º or 55º seats
4.060 fixture 
.200 143
.300 214
.400 277
.500 327
.600 363
.700 381
.800 383
.900 387
1.00 390

This is a GM casting for mandated OEM classes.  Comp Eliminator and Super Stock wedge classes that must run an OEM part number.  The v615x can be custom built into any configuration.   Many different options make this cylinder head fully universal on class requirements.  Please call me to discuss options. Has made 2.65hp/cid in single four trim.

GM 615X 15º cylinder head can also be rolled to 12º.  The 12º head includes angle milling and bolt hole correcting.  There are many variations of this head so please call with requirements.  Bare heads include guides and Beryllium seats.

Bare CNC w/Valve Job 15º- call
Bare CNC w/Valve Job 12º- call
Hand Finished- $500