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Edelbrock 51259 - Edelbrock Performer RPM Xtreme Small Block Ford Cylinder Heads

  • Cylinder Head, RPM Xtreme, Aluminum, Assembled, 59cc Chamber, 185cc Intake Runner, Ford, 351W, Each
  • Application Specific
  • Estimated Ship Date: 2/25/2010
 
BrandEdelbrock
Manufacturer's Part Number51259
Part TypeCylinder Heads
Product LineEdelbrock Performer RPM Xtreme Small Block Ford Cylinder Heads
Summit Racing Part NumberEDL-51259
 
Cylinder Head StyleAssembled
Cylinder Head MaterialAluminum
Cylinder Head FinishNatural
Combustion Chamber Volume (cc)59
CNC-Machined Combustion ChamberYes
Intake Runner Volume (cc)185cc
Exhaust Runner Volume (cc)75cc
CNC-Machined Intake RunnerNo
CNC-Machined Exhaust RunnerNo
Intake Port ShapeRectangular
Intake Port LocationStandard
Exhaust Port ShapeSquare
Exhaust Port LocationStandard
Spark Plug StyleAngle
Intake Valves IncludedYes
Intake Valve Diameter (in)2.020 in.
Exhaust Valves IncludedYes
Exhaust Valve Diameter (in)1.570 in.
Valve Springs IncludedYes
Maximum Valve Lift (in)0.600 in.
Outside Diameter of Outer Spring (in)1.290 in.
Damper Spring IncludedYes
Number of Springs Per ValveSingle
Retainers IncludedYes
Retainer MaterialSteel
Locks IncludedYes
Lock Style7 degree
Valve Stem Seals IncludedYes
Valve Stem Seal StylePC seal
Rocker Arm Studs IncludedYes
Rocker Arm Nut Thread Size7/16-20 in.
Rocker Arms IncludedNo
Rocker Arm Nuts IncludedNo
Guideplates IncludedYes
Guideplate Pushrod Size5/16 in.
Valve Cover Mounting StylePerimeter bolt
Accessory Bolt Holes DrilledYes
Intake Valve Angle18
Exhaust Valve Angle18
Valve Guides IncludedYes
Valve Guide MaterialManganese bronze
Valve Seats MachinedYes
Valve Seat Machine Style3-angle
Valve Seat MaterialDuctile iron
Steam Holes DrilledNo
Oiling StyleThrough pushrod
Machined for O-RingNo
Heat CrossoverNo
QuantitySold individually.
NotesThe intake runners feature a CNC profiled entry and the exhaust runners feature a CNC profiled exit. They are not fully CNC ported.
 

Get Xtreme performance for your high performance Ford.

Designed for 351 Windsor and larger high-performance street and racing applications, Edelbrock's Performer RPM Xtreme cylinder heads give you the best combination of as-cast port design and CNC porting technology. This proven combination provides you with a powerful cylinder head at a lower cost than a typical fully CNC'd head. They feature an 18 degree valve angle, CNC-machined 59cc combustion chambers, 185cc intake ports, lightweight 2.02 in. intake and 1.570 in. valves with 8mm stems, and beehive valve springs.

Warranty

Edelbrock Corporation products are covered by a general warranty that states that their products will be free from defects in materials and workmanship. The length of this warranty is as follows: Performer series carburetors and Race Division products (90 days), remanufactured carburetors (30 days), Tubular Exhaust Systems and Thunder Series AVS Carburetors (one year), stainless steel exhaust systems (five years), RPM series mufflers/cat-back exhaust systems and IAS strut and shock absorbers (limited lifetime warranty; finish and shock boots are not covered), and crate engines (2 years or 24,000 miles, whichever comes first). All warranties are based on the assumption that the product(s) were properly installed, subjected to normal use and service, and that they have not been modified, neglected, or used on racing or competition applications. The warranty covers only the product itself, and not the cost of installation and removal. Edelbrock's warranty card must be completed and received by Edelbrock no later than 30 days from the purchase date to validate the warranty. Cylinder heads must be returned to Edelbrock for inspection before any refund or exchange will be done.