Performer LT1 Cylinder Heads (54cc)

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Edelbrock part # 61905 Performer small-block Chevy LT1 (1992-97) Performer complete cylinder heads deliver 24 horsepower over stock and raise the peak power level by 500 rpm. These heads are designed to accept factory style self-aligning rockers. Performer LT1 cylinder heads are 50-state street legal and accept factory center bolt valve covers. They feature exhaust ports in the stock location for use with stock or aftermarket exhaust manifolds and headers. Match with RPM Air-Gap intake #7107, throttle body #3809 and camshaft #2108 for the Total Power Package combo.Cylinder Head Specifications: • Finish: Satin • Designed for use with Hydraulic Roller camshafts • Intake runner volume: 170cc • Exhaust runner volume: 60cc • Combustion chamber volume: 54cc • Intake valve diameter: 1.94” • Exhaust valve diameter: 1.55” • Valve stem diameter: 11/32" • Valve guides: Manganese Bronze • Valve spring diameter: 1.46” • Valve spring maximum lift: .600” • Rocker stud: 3/8” • Guide plate: Hardened Steel • Pushrod diameter: 5/16" • Valve angle: 23 Degrees • Exhaust port location: Stock • Deck thickness: 5/8” • Spark plug fitment: 14mm x 3/4 reach, gasket seat


Availability Available
Ech Ival Dia 1.940 in
Head Casting Number 31-6190
Guide Plate Material Hardened Steel
CARB Executive Order Number D-215-70
Application Application Specific
UPC 00085347619054
Availability Note Available to Order
Warranty 12 Months
Emissions Code
EO Number: D-215-70
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
  • Head Bolt Kit: Edelbrock # 8550
  • Head Gasket: Edelbrock # 7342
  • Intake Gasket: Fel-Pro # 7243
  • Exhaust Gasket: Edelbrock # 7248
  • Recommended spark plugs: Champion RC12YC
CNC Ported No
Combustion Chamber Volume 54.0 cc
Deck Height 9.025 in
Deck Thickness 0.625 in
Exhaust Valve Diameter 1.550 in
Guide Plates Included Yes
Intake Runner Volume 170.0 cc
Material Aluminum
Push Rod Diameter 0.312 in
Rocker Stud Diameter 0.375 in
Valve Angle 23 deg
Valve Spring Diameter 1.460 in
Valve Spring Maximum Lift 0.600 in
Valve Stem Diameter 0.341 in