Holley GM LS3/L92 Hi-Ram Carbureted Lower Intake Manifold (10-15 Camaro SS)

Description

Performance Intake Component. The Holley GM LS3/L92 Hi-Ram Carbureted Lower Intake Manifold is engineered to optimize airflow for carbureted applications on GM LS3 and L92 engines. It functions as the base mounting point for a carburetor, enabling efficient air and fuel mixture delivery essential for high-performance operation. Its design focuses on maximizing mid to high RPM power, ideal for racing and performance engine builds. This product is intended for racing use only and is not legal for use on emissions-controlled vehicles.

Construction and Appearance. Made from cast aluminum, this intake manifold provides lightweight durability with a natural finish. The as-cast runners feature a tapered cross-sectional design to improve airflow velocity and volume. While it is designed to work with precision molded O-ring gaskets, these gaskets are not included with the product and must be sourced separately.

Installation. Installation requires automotive fabrication experience related to carbureted high-performance LS applications. This manifold bolts to compatible LS3/L92 rectangular-port heads, but a complete carbureted upper/plenum and supporting fuel/ignition system modifications are necessary. Additional fabrication and tuning are typically required for proper operation, and it is not a direct OE-style replacement for factory fuel-injected systems.

Warranty. This product includes a manufacturer’s limited 90-day warranty covering defects in materials and workmanship.

Application. Specifically designed for LS3/L92 rectangular-port cylinder heads. While broadly compatible with GM LS3/L92 engine families, fitment to production vehicles such as the 2010-2015 Camaro SS requires supporting carbureted conversion and is not a straight bolt-on swap without additional modification.

Holley 300-213

CA Residents: WARNING: Cancer and Reproductive Harm

• Carbureted Base Only With Plenum-Top-Mounting Fabrication Flange Available
• Plenum Top Gasket Type – 3/32” Round O-ring Cord (Gaskets Not Included)
• Port Size – 2.49” Height X 1.21” Wide
• Mounting Flange Gasket Type – Standard LS3 Molded O-Ring (Gaskets Not Included)
• Runner Length – 6.50” As-Cast Runner Cross-Sectional Area – Tapered 4.25” To 2.77 In²
• Basic Operating RPM Range – 3500-8000 RPM
• Category – Engine
• Construction – Cast Aluminum
• Cylinder Head Port Shape – Rectangle
• Deck Height – 9.24 IN
• EGR Port – No
• Emission Code – 4
• Engine Compatible With – GM LS3/L92
• Fuel System Type – Carbureted
• Grade Type – Performance
• Material – Aluminum
• Plenum Finish – Natural
• Product Type – Intake Manifold Base Lower Manifold
• Removable Top/Lid – Yes
• Runner Length – No Removable Runners
• Single Plane Type – Single Plane
• Vacuum Ports – Yes
• Warranty – Manufacturer’s Limited 90 Day Warranty
• Designed for LS3/L92 rectangular-port cylinder heads in carbureted applications