Holley 300-131 - Intake Manifold, Ls3, Street Single-Plan

Carbureted single plane intake manifold. Fits all GM LS Gen III or IV engines equipped with LS3/L92 style rectangular port cylinder heads Carbureted single plane intake manifold. Fits all GM LS Gen III or IV engines equipped with LS3/L92 style rectangular port cylinder heads Features: • 2500-7000 RPM power band • 4150 Square bore flange (accepts up to 1.75" diameter throttle bores) • Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 2500-7000 RPM • Minimum carb flange height - fit in vehicles with minimum hood modifications • Cast aluminum construction - great manifold for centrifugal blower, turbocharged or NOS power adder applications • Efficient casting design - lightweight, consistent wall thicknesses, improved casting quality • Weight - 11.5 lbs. • Height (front) - 5.417" to the lifter valley cover flange at the engine block front flange • Port size - 2.50" height x 1.15" wide • Includes Viton® O-ring intake to cylinder head gaskets - Viton® is a registered trademark of DuPont Performance Elastomers