Feature as-cast ports and are designed for entry-level street performance 1955-86 applications. Designed for use with hydraulic flat tappet camshafts only, not compatible with hydraulic roller camshafts. All E-Street cylinder heads are sold in pairs. Dyno tests showed a gain of 16 hp and 11 ft-lbs of torque over our overseas competitor.

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Proflow Cylinder Heads, AirMax 180, SB Chev, Aluminium, Assembled, 72cc Chamber, Angle Plug, 180cc Intake Runner, Pair

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