CNC PORTED V8 Holden 304 308 5.0L VN Carby Cylinder Heads, BARE (exchange castings required)

Holden 308 304 5.0L 355 Stroker Cast Iron VN EFI Cylinder Heads. CNC ported and reconditioned. 

Suits 1989-98 Holden VN Commodore 5.0L & 355 Strokers engines applications with a CARBY or EFI

SOLD AS A BARE PAIR CYLINDER HEADS

(exchange required, can supply outright for an extra charge)

Fully Reconditioned and machined for screw in studs. CNC ported and Chambers CNC ported. Crack tested, Hot Tanked and New K-Liine guides fitted.

Race 3 Angle valve job & machined spring seats and valve stem seals. Chambers are cc checked and finished to customers requirments, options are 56cc through to 64cc.  

Brand: PAVTEK

Series    Competition Race CNC ported

Grade Type         High Performance

Quantity              Pair 

Camshaft Type  - Can assemble to customers requirements

Horsepower       500 HP +

Seat Angle           Exhaust 45 deg/Intake 45 deg

Series:  RACE PORT

CNC Ported         YES

Combustion Chamber Volume   56 to 64 cc  *Please Advise

Intake Valve Diameter   2.020 in

Exhaust Valve Diameter 1.625 in

Intake Runner Volume   xxx cc

Material            OEM Cast Iron - (exchange required, can supply outright for an extra charge)

Rocker Studs:    Machined for 7/16”   (not included)

Valve Angle:        Race 3 angle

Valve Spring Diameter   1.45 in

Valve Spring Maximum Lift    Depending on application - please ask

Valve Stem Diameter      5/16”

Installation Notes           

Capable of 500+ horsepower on pump gas.; Intended as an upgraded replacement for factory heads and is configured as an easy bolt-on part for 1989-98 5.0L VN Commodore engines and as an upgrade to all earlier Holden production engines.