Edelbrock 51559 - Edelbrock RPM Xtreme Series Cylinder Heads
Edelbrock #350-51559RPM XT Cylinder Head |
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Edelbrock 51559 - Edelbrock RPM Xtreme Series Cylinder Heads Details
Big-Block Chevy Cylinder Heads
The RPM Xtreme for big-block Chevy is an all new design that is CNC ported where it counts to achieve optimal air-flow for maximum horsepower and torque in high performance street and light duty racing applications. The casting and port design are all new and engineered to be as close to perfect as possible. To ensure consistency from port to port, the RPM Xtreme is treated to a fully CNC ported combustion chamber, and then CNC ported in the bowl area (above the valve) for a smooth transition into the valve seats. The intake runner entries and exhaust runner exits are partially CNC ported for improved air-flow. RPM Xtreme big-block Chevy heads have a 24.5° x 4.4° intake valve angle, 15.5° x 4.2° exhaust valve angle, stock exhaust port locations, and the spark plug angles have been modified to produce a smooth flame front for increased fuel efficiency and maximum power. These heads also feature an exhaust port location that works with readily available, off-the-shelf big block Chevy headers. Specs:
For the ultimate performance, Xtreme heads are CNC ported where it counts. Edelbrock RPM Xtreme cylinder heads give you the best combination of as-cast port design and custom CNC technology by blending the affordability of as-cast ports with custom CNC porting, in the critical areas (combustion chambers, intake entry, exhaust exit and intake/exhaust bowls), for improved air flow and overall performance. This proven combination provides you with a powerful cylinder head at a lower cost than a typical fully CNC'd cylinder head. Edelbrock Xtreme heads are ideal for high-performance street and entry-level race applications. XT Heads are sold complete with high-quality springs, stainless steel valves and have heli-coil inserts installed in the exhaust flange and rocker stud bosses. Sold individually. Made in USA.
