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Oldsmobile
- NHRA Super Stock Legal Cylinder Head
- 1965-1976 400-455ci
- Port Volume: 188cc/106cc
- 77cc Combustion Chambers
- 7/6" Rocker Studs
- Bare Head, Sold Individually
- Combustion chamber volume: 77cc
- Intake runner volume: 188cc
- Exhaust runner volume: 106cc
- Intake valve diameter: 2.072"
- Exhaust valve diameter: 1.68"
- Valve stem diameter: 11/32"
- Valve guides: Manganese bronze
- Deck thickness: 5/8"
- Rocker stud: 7/16"
- Pushrod diameter: 3/8"
- Valve angle 18°
Made In USA
Since founder Vic Edelbrock Sr. began building performance intake manifolds in 1938, Edelbrock has grown into one of the most trusted names in American high-performance parts, from carburetors and intake manifolds to cylinder heads, crate engines, and EFI systems. JEGS has spent decades supplying Edelbrock components to racers, engine builders, and street enthusiasts, backing this extensive lineup with in-house technical support, fast shipping, and a Price Match Guarantee so you can choose proven Edelbrock parts with confidence.
NHRA legal Performer RPM aluminum cylinder heads for Stock and Super Stock racing classes. These heads are similar to Edelbrock RPM cylinder heads, however the NHRA Legal heads do not have any machining or hand grinding done on the ports & chambers, except for the seat guide bores. Heads feature the NHRA logo on the ends for easy identification. Heads are sold individually. Made In The USA!Part TypeCylinder Head
Product LineEdelbrock Performer RPM NHRA Legal Heads
BrandEDELBROCK
Package Height9.1
Package Width11.1
Package Length26.0
Weight30.9 PG
Part CategoryPerformance Parts
Cylinder Head MaterialAluminum
Intake Port LocationStandard
EmissionNon-Emissions
Exhaust Valves IncludedNo
Locks IncludedNo
Engine Make/SizeOlds 400-455
Retainers IncludedNo
Guideplates IncludedNo
Rocker Arms IncludedNo
Oiling StyleThrough pushrod
Rocker Arm Nuts IncludedNo
Cylinder Head FinishNatural
Valve Seats MachinedNo
Intake Valve Angle18
Valve Seat MaterialDuctile iron
Heat CrossoverNo
FinishCast Steel
Valve Springs IncludedNo
UsageCompetition
Damper Spring IncludedNo
Valve Guides IncludedYes
Cnc-Machined Intake RunnerNo
Intake Valves IncludedNo
Combustion Chamber StyleHeart
QuantitySold individually
Cylinder Head TypeStandard
Valve Stem Seals IncludedNo
Intake Valve Diameter2.072 in (52.629 mm)
Accessory Bolt Holes DrilledYes
Exhaust Runner Volume (Cc)106
Exhaust Port LocationStandard
Valve Guide MaterialManganese bronze
TypeBare
Combustion Chamber Volume (Cc)77
Machined For O-RingNo
PreparationRequires Professional Preparation (Bare)
Steam Holes DrilledNo
Rocker Arm Studs IncludedNo
Cylinder Head StyleBare
Valve Cover Mounting StylePerimeter bolt
Intake Runner Volume (Cc)188
Cnc-Machined Exhaust RunnerNo
Cnc-Machined Combustion ChamberNo
Exhaust Valve Diameter1.68 in (42.672 mm)
Vendor Part Number60517
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
