Big Block Chevy Aluminum Cylinder Heads 340cc 124CC 2.25 / 1.88 Valves

These rectangle port cylinder heads are assembled in house and they come complete and ready to bolt on. Complete with rocker studs and guide plates. They are set up for a .650 lift mechanical flat tappet or hydraulic roller camshaft. They have dual springs with damper and have 145lbs of spring pressure.  They also feature hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. 

Combustion Chamber Volume (cc): 124
Intake Runner Volume (cc): 340cc 
Cylinder Head Style: Assembled
Cylinder Head Material: Aluminum
Intake Port Shape: Rectangle
Intake Valve Diameter (in.): 2.250 in.
Cylinder Head Finish: Natural
CNC-Machined Combustion Chamber: No
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Intake Port Location: Standard
Exhaust Port Shape: Square
Exhaust Port Location: Standard
Intake Valves Included: Yes
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in.):1.880 in.
Valve Springs Included: Yes
Maximum Valve Lift (in.): 0.650 in.
Outside Diameter of Outer Spring (in.):1.540 in.
Damper Spring Included: Yes
Number of Springs Per Valve: Dual
Retainers Included: Yes
Retainer Material: Steel
Locks Included: Yes
Lock Style: 10 degree
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Positive stop
Rocker Arm Studs Included: Yes
Rocker Arm Nut Thread Size: 7/16-20 in.
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Guideplate Pushrod Size: 3/8 in.
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 26
Valve Guides Included: Yes
Valve Guide Material: Manganese bronze
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 PAIR