Edelbrock RPM XT Cylinder Heads - CNC Ported where it Counts! RPM XTREME SERIES CYLINDER HEAD FOR SMALL-BLOCK FORD
Designed for 351W and larger high-performance street and racing applications, our new 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° valve angle, CNC-machined 59cc combustion chambers, 185cc intake ports, lightweight 2.02" intake valves with 8mm stems, and beehive valve springs.
Key Areas of CNC Porting Include:
Fully CNC ported combustion chambers
CNC profiled intake entry
CNC profiled exhaust exit
CNC blended intake and exhaust bowls
51259 RPM Xtreme Cylinder Head Specifications
Combustion Chamber
59cc
Intake Runner Volume
185cc
Exhaust Runner Volume
75cc
Intake Valve
2.02-inch
Exhaust Valve
1.57-inch
Deck Thickness
5/8-inch
Beehive Valve Spring
1.540-inch o.d.
1.900-inch Installed height
Up to .600" lift
Rocker Stud / Guideplate
7/16" / Hardened Steel
Part #
#51259
Flow Data
Lift
Intake flow (CFM)
Exhaust flow (CFM)
.100"
78
63
.200"
146
119
.300"
213
173
.400"
257
197
.500"
281
205
.600"
292
209
Technical Notes: Sold individually. Requires the use of hardened push rods. Designed with 1/2" head bolt bosses; use #9680 head bolt bushing kit for use with 7/16" head bolts.
Click Here for the Dyno Sheet comparison vs. competitors fully CNC ported head
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