Engineered to greatly increase performance and efficiency, E-TEC heads fit SB-Chevy 302-400ci engines with ''Vortec'' style intake manifolds. These powerful heads incorporate Edelbrock's high-quench combustion chamber which promotes a more uniform atomization of the air/fuel mixture for more power. Spark plugs have been positioned closer to the center of the cylinder for more efficient combustion. Swirl-polished stainless steel valves provide maximum flow. They accept center bolt or standard valve covers, work with most stock exhaust manifolds and have intake and exhaust ports that are .200'' taller than typical SB-Chevy heads. Match these heads with an Edelbrock Vortec intake manifold for the best results.

Performer RPM E-TEC 170

20% more exhaust flow than cast iron Vortec heads, good power up to 6,000 RPM

64cc combustion chambers produce 9.5:1 compression with stock pistons on a 350ci engine

Performer RPM E-TEC 200

Outflow similar aluminum heads by 10% on the intake and 17% on the exhaust side

Make power up to 6,500 RPM

64cc combustion chambers produce 10.2:1 compression with flat-top pistons in 350ci engines

E.O. number pending