E-Street, Gen III Chevrolet LS, Cathedral Port, 0.660" Maximum Lift

Edelbrock’s E-Street 15° LS1 Cathedral and LS3 cylinder heads are a premium replacement option, ensuring great power on any performance or stock GM LS1/LS3 engine build.

Sold in pairs and assembled with premium COMP Cams® valve train components, these LS1/LS3 heads are engineered with the same architecture as the factory head, and all stock components will fit without issue. The assembled heads feature either dual or Beehive™ Valve Springs, chromoly steel retainers, heavy-duty stainless-steel valves, and top-quality valve seals – all inspected and assembled by qualified Edelbrock technicians. The Beehive Valve Springs allow up to .570” lift camshafts, while the dual spring option is good for up to .660” lift, ideal for many mild to hot camshaft grinds.

Edelbrock E-Street 15° LS1/LS3 Cylinder Heads are manufactured with premium aluminum alloy and machined to the industry’s tightest tolerances. They feature manganese bronze valve guides for long wear with particular emphasis on holding precision tolerances on valve seat concentricity. This allows the valves to seal securely, eliminating any leak-down and increasing cylinder pressures during engine operation.

All Edelbrock cylinder heads feature patented Clean Cast Technology™, a revolutionary process that eliminates casting flaws and promotes a smoother internal surface finish for greater air and coolant flow. These benefits provide more power and increased cooling ability right out of the box. A unique dual spark-plug-pocket design allows you to use both the factory-style tapered-seat spark plugs or gasket-seat spark plugs that are available in wider heat ranges for maximum tunability.