Holden 253 304 308 195cc 64cc 7_ Hydr-FT Complete Aluminum Cylinder Heads

Brand:	Speedmaster
Part Number:	PCE281.2067
Part Type:	Cylinder Head [Assembled]
Cylinder Head Style:	Assembled
Cylinder Head Material:	Aluminum
Cylinder Head Finish:	Natural
Combustion Chamber Volume (cc):	64 cc
CNC-Machined Combustion Chamber:	No
Intake Runner Volume (cc):	195 cc
Exhaust Runner Volume (cc):	n/a
CNC-Machined Intake Runner:	No
CNC-Machined Exhaust Runner:	No
Intake Port Shape:	Rectangular
Intake Port Location:	Standard
Exhaust Port Shape:	Square
Exhaust Port Location:	Standard
Spark Plug Style:	Standard
Comp. Valve Job:	No
Intake Valves Included:	Yes
Intake Valve Diameter (in):	2.020 in.
Exhaust Valves Included:	Yes
Exhaust Valve Diameter (in):	1.600 in.
Valve Springs Included:	Yes
Maximum Valve Lift (in):	0.550 in.
Outside Diameter of Outer Spring (in):	1.250 in.
Damper Spring Included:	Yes
Number of Springs Per Valve:	Single
Retainers Included:	Yes
Retainer Material:	Chromoly steel
Locks Included:	Yes
Lock Style:	7 degree
Valve Stem Seals Included:	Yes
Valve Stem Seal Style:	Positive stop
Rocker Arm Studs Included:	No
Rocker Arms Included:	No
Rocker Arm Nuts Included:	No
Guideplates Included:	No
Valve Cover Mounting Style:	Perimeter Bolt
Accessory Bolt Holes Drilled:	Yes
Intake Valve Angle:	Standard
Exhaust Valve Angle:	Standard
Valve Guides Included:	Yes
Valve Guide Material:	Steel
Valve Seats Machined:	Yes
Valve Seat Machine Style:	3-angle
Valve Seat Material:	Ductile iron
Steam Holes Drilled:	No
Oiling Style:	Through pushrod
Machined for O-Ring:	No
Heat Crossover:	No
Quantity:	Sold as a pair.
Notes:	Designed for use with hydraulic flat tappet camshafts less than .550 in. lift. Requires use of hardened pushrods. The valve and seat combination, used in these heads, is not recommended for use with a hydraulic or mechanical roller camshaft.

The Speedmaster V8 Holden VN cylinder head is a definite step above the rest. We utilize high flow ports and larger diameter hardened seats that offer improved flow and increased longevity when used with today s low lead fuels. Not only do you get more performance out of the box than OEM heads, our heads are significantly lighter since they are made of Gravity Die Cast Aluminum. There is absolutely no reason to rebuild your set of OEM castings when you can use a higher flowing, lighter, more detonation resistant cylinder head. You won t find a head that offers better value. Period. INTAKE / EXHAUST GASKETS The Speedmaster heads are designed around using factory replacement gaskets. We offer two different styles of intake gaskets. The Speedmaster PCE349.1017 is a paper style gasket for people looking for the lowest cost option, or head porters that are want a plain gasket they can trim to fit enlarged ports. We also have a premium Printed Sealer type gasket, Speedmaster PCE349.1016. HEAD GASKETS Because our VN head is designed as a performance replacement for the factory head, you can use any OEM style head gaskets. We prefer our Speedmaster MLS head gasket PCE348.1027. With all stainless construction, you won t find a better gasket anywhere! If you prefer Fel-Pro, use Fel-Pro # 1059 headgaskets. HEAD BOLTS / STUDS The head bolts / studs required are the same as factory Holden heads. Speedmaster offers a 190,000 psi. head stud kit to suit our VN perfectly! the part number is PCE279.1020 ARP also offers both head bolts and head stud kits. Their head bolt kit is #205-3601 and the head stud kit is # 205-4601. Be careful to torque the heads following the OEM sequence in 3 steps to a final torque setting of 65lbs. using high pressure molly lube under the nuts and on the exposed threads of the studs. SPARKPLUGS Our Holden 304-308 cylinder heads require the use of a 14m. thread, 5/8 hex, .750 reach spark plug. Below you will find a list of some plugs that fit and work with our heads: NGK - BCPR6ES, R5671A-7, R5671A-8 Autolite - 3923, 3924, AR3933, AR3934 Champion - RC12YC, RC10YC4, RC9YC3 Remember that you need a COLDER plug when you make more power, ie.