RPM Big-Block Buick Cylinder Head

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The Edelbrock #60049 Performer RPM Super Stock Cylinder Heads are designed for 400, 430 and 455 c.i.d. Buick engines. This cylinder head includes adjustable rocker stud and guide plate set-up for use with small-block Chevy style adjustable 1.6:1 ratio rockers. The large 68cc combustion chambers produce 9.2:1 compression ratio with stock pistons. Performer RPM heads are perfect for street performance, daily drivers, street rods and muscle cars where seat-of-the-pants performance is needed. These cylinder heads deliver great throttle response and power from 1500 to 6500 rpm. They also feature the highest quality intake and exhaust valves and valve springs. For use on pre-pollution controlled vehicles only.

Documents & Installation Notes


Availability Available
Ech Ival Dia 2.125 in
Head Casting Number 31-6092
Guide Plate Material Hardened Steel
Application Application Specific
UPC 00085347600496
Availability Note Available to Order
Warranty 12 Months
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Match with Edelbrock head gasket sets.
  • Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.
  • Deck thickness: 5/8"
  • Rocker stud diameter: 3/8"
  • Pushrod diameter: 3/8" (width of slot in guide plate).
CNC Ported No
Combustion Chamber Volume 68.0 cc
Deck Thickness 0.625 in
Exhaust Valve Diameter 1.750 in
Guide Plates Included Yes
Intake Runner Volume 215.0 cc
Material Aluminum
Push Rod Diameter 0.375 in
Rocker Stud Diameter 0.375 in
Valve Angle 15 deg
Valve Spring Diameter 1.550 in
Valve Spring Maximum Lift 0.600 in