Bare Aluminium Cylinder Heads (Pair), 315cc Runner with 121cc Chamber
Suit Big Block Chev, Rectangle Port
AF95-0427
Aeroflowäó»s big block Chevy cylinder heads are designed for entry-level street performance engines and ideal for operating in the idle to 6750 rpm range. Made from A356 aluminium castings. These complete heads include larger than-stock 1.625" (41mm) diameter valve spring with damper to handle up to 0.850" (21.5mm) maximum valve lift. Recommended spark plugs are 14mm x 3/4" reach with flat gasket seat.
Head Specifications:
- Chamber volume: 121cc Chamber
- Valve spring diameter: 1.625" (41mm) Single spring with damper
- Spring installed height: 2.080" @ 100lbs
- Rocker stud diameter: 7/16"
- Pushrod diameter: 3/8" (width of slot in guide plate)
- Maximum valve lift: 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600
- Intake port volume: 315cc
- Intake valve size: 2.25"
- Exhaust valve size: 1.88"
- Spark plug style: Straight