Edelbrock Cylinder Head E-Street 70CC Pair Small Block Chevy

Edelbrock offers Cylinder Heads for every performance level. The 70cc E-Street Series Cylinder Head (5073) is ideal for 1955-1986 Small Block Chevy engines operating in the idle-to-5500 RPM range. Sold as a pair, the Cylinder Heads will aid in your entry-level street performance needs.

Features and Benefits:
- For use on Pre-Pollution-Controlled Vehicles
- Dyno-Tested Gains of 16 hp and 11 ft-lbs of Torque
- Improved Combustion
- Oversized Intake and Exhaust Ports Promote Airflow
- Designed for Entry-Level Street Performance

Edelbrock delivers American-made quality at an attractive price point. Unmatched by overseas competitors, the E-Street Series Cylinder Heads showed Dyno-tested gains of 16 hp and 11 ft-lbs of torque. 

Specifications: 
- Not CNC Ported    
- 70cc Combustion Chamber Volume
- 9.025 in Deck Height    
- 0.562 in Deck Thickness    
- 1.600 in Exhaust Valve Diameter    
- Guide Plates Included     
- 185cc Intake Runner Volume    
- 2.020 in Intake Valve Diameter    
- Aluminum Material    
- 0.312 in Push Rod Diameter    
- 0.375 in Rocker Stud Diameter    
- 23 Degree Valve Angle    
- 1.460 in Valve Spring Diameter    
- 0.550 in Valve Spring Maximum Lift    
- 0.341 in Valve Stem Diameter 

E-Street Cylinder Heads feature as-cast ports and a modern combustion chamber to improve the combustion process. An oversized, larger-than-stock intake and exhaust ports direct more air through your engine for improved efficiency.

Tech Tip: Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat.

Additional Notes: 
- Designed for use with hydraulic flat tappet camshafts only; not compatible with hydraulic roller camshafts. 
- Use with Hydraulic Flat Tappet Camshafts .550" max lift. 
- Requires hardened pushrods.
- Not legal for sale or use on pollution-controlled motor vehicles.