Edelbrock RPM Xtreme LS1 Cylinder Heads

RPM Xtreme LS Series Head
Edelbrock's new RPM Xtreme cylinder heads give you the best combination of as-cast port design and custom CNC technology. Through dedicated engineering and rigorous testing, Edelbrock engineers have designed a new line of cylinder heads called RPM Xtreme. These heads blend 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 head.

• Direct replacement for 1997 and later GEN III and GEN IV engines, including 4.8L, 5.3L, 5.7L and 6.0L V8s
• Tested on a Z06 Corvette LS1 engine, these heads made 488 hp @ 6500 rpm and 432 ft./lbs. of torque @ 5000 rpm with just a head and cam change— no re-programming!
• 5/8" thick deck can be machined for additional compression if desired
• 214cc intake ports flow 286 cfm @ .600" lift
• 80cc exhaust ports flow 215 cfm @ .650" lift w/o pipe
• Stainless steel 2.02" intake and 1.57" exhaust valves
• Performance gains comparable to competitors’ fully CNC’d heads, giving you performance at an affordable price!
• Executive Order number D-215-69 for part #61949