LS3/L92 Holley Dual Plane Mid Rise Single Carb Intake Manifold


Model Number: 300-129

All GM LS Gen III or IV engines equipped with LS3/L92 style rectangular port cylinder head.


•1500-6500 RPM power band

•4150 Square bore flange

•Optimized runner layout and constant cross sectional area – broad torque curve, best vehicle performance from 1500-6500 RPM

•Minimum carb flange height – fit in vehicles with minimum hood modifications

•Cast aluminum construction – great manifold for carbureted or throttle body EFI street applications

•Efficient casting design – lightweight, consistent wall thicknesses, improved casting quality

•Height (front) – 5.07″

•Height (rear) – 6.14″ to the lifter valley cover flange at the engine block front flange and bellhousing flange

•Port size – 2.454″ height x 1.09″ wide

•Mounting flange gasket type – o-ring

• Includes Viton® o-rings – Viton® is a registered trademark of DuPont Performance Elastomers


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