CYLINDER HEADS - Chevy - Big Block - Performer RPM 454-O
Performer RPM 454-O
  • These oval port heads will support over 540 hp with 9.5:1 compression when used as part of the Total Power Package
  • Unique oval intake port shape produces flow similar to rectangular ports, but the smaller port size provides excellent seat-of-the-pants performance and crisp throttle response
  • Semi-open chamber design maximizes efficiency with streetable compression ratios
  • Smaller-than-stock 11/32" valve stems promote excellent flow and lighter valve weight


Cylinder Head Specifications

Combustion chamber volume 110cc
Intake runner volume 290cc
Exhaust runner volume 110cc
Intake valve diameter 2.19"
Exhaust valve diameter 1.88"
Valve stem diameter 11/32"
Valve guides Manganese bronze
Deck thickness 9/16"
Valve spring diameter 1.55"
Valve spring maximum lift .700"
Rocker stud 7/16"
Guideplate Hardened steel
Pushrod diameter 3/8"
Valve angle 26°
Exhaust port location Stock
Spark plug fitment 14mm x 3/4 reach, gasket seat
Made In USA




Technical Notes: Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. Recommended spark plugs 14mm x 3/4" reach with flat gasket seat (Champion RC12YC).
 
Description Bare Complete
Performer RPM 454-O 60449* 60459*

Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
#60449 | #60459
Valve Lift .100" .200" .300" .400" .500" .600" .700"
Intake 74 143 207 250 284 309 -
Exhaust 71 128 153 178 200 218 -
* Not legal for sale or use on pollution controlled motor vehicles.
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