The SR 20 cylinder heads feature .500"raised, 440cc intake ports that com-bine with a 2.400" intake valve for over 500 CFM of air flow. Heads feature a 20ø valve angle and require special pistons, valve covers, head studs, shaft rockers, and intake manifold. Sold individually.
- Cylinder Head Style:
- Assembled
- Cylinder Head Material:
- Cast aluminum
- Cylinder Head Finish:
- Natural
- CNC-Machined Combustion Chamber:
- Yes
- Combustion Chamber Volume (cc):
- 95cc
- Combustion Chamber Style:
- Heart
- CNC-Machined Intake Runner:
- Yes
- Intake Runner Volume (cc):
- 440cc
- Intake Port Shape:
- Rectangular
- Intake Port Location:
- Raised 0.500 in.
- Intake Valve Angle:
- 20 degree
- CNC-Machined Exhaust Runner:
- Yes
- Exhaust Runner Volume (cc):
- N/A
- Exhaust Port Shape:
- Round
- Exhaust Port Location:
- Standard
- Exhaust Valve Angle:
- 13 degree
- Intake Valves Included:
- Yes
- Intake Valve Diameter (in.):
- 2.400 in.
- Exhaust Valves Included:
- Yes
- Exhaust Valve Diameter (in.):
- 1.800 in.
- Valve Type:
- Stainless
- Maximum Valve Lift (in.):
- 0.850 in.
- Valve Springs Included:
- Yes
- Valve Spring Type:
- Dual W/Damper
- Outside Diameter of Outer Spring (in.):
- 1.625 in.
- Valve Guides Included:
- Yes
- Valve Guide Material:
- Phosphorous bronze
- Valve Seats Machined:
- Yes
- Valve Seat Material:
- Ductile iron
- Valve Seat Machine Style:
- 3-angle
- Retainers Included:
- Yes
- Retainer Material:
- Titanium
- Valve Stem Seals Included:
- Yes
- Valve Stem Seal Style:
- PTFE Positive stop
- Locks Included:
- Yes
- Lock Style:
- 10 degree
- Camshaft Style:
- Solid roller
- Spark Plug Style:
- Straight
- Guideplates Included:
- Yes
- Guideplate Pushrod Size:
- 3/8 in.
- Rocker Arm Studs Included:
- Yes
- Rocker Arm Nut Thread Size:
- 7/16-20 in.
- Accessory Bolt Holes Drilled:
- Yes
- Valve Cover Mounting Style:
- Perimeter bolt
- Heat Crossover:
- No
- Steam Holes Drilled:
- No
- Oiling Style:
- Through pushrod
- Machined for O-Ring:
- No
- Quantity:
- Sold individually.
- Notes:
- Minimum 4.600 in. bore diameter. Requires pistons, valve covers, head studs, shaft rockers, and an intake manifold designed specifically for the Brodix SR 20 cylinder heads.
- Make:
- Chevrolet
- Engine Family:
- Chevy big block Mark IV
