Description
Premium Performance Intake. The Holley GM LS3/L92 Dual Plane Carbureted Intake Manifold delivers an efficient air and fuel mixture to GM LS engines, enabling powerful low-end torque and high RPM capabilities up to 6,500. Designed for quick and straightforward carburetor installation, it is ideal for enthusiasts looking to convert or upgrade their LS engines with a reliable intake solution for racing use.
Construction and Appearance. Crafted from cast aluminum, this intake manifold features consistent wall thicknesses and an efficient casting design that prioritizes strength while keeping weight low. Its natural finish maintains a professional and clean look suitable for under-hood presentation in performance applications.
Installation. Installation is straightforward with O-ring cylinder head mounting flange gaskets providing an OEM-style seal. No drilling is required, making it an accessible upgrade for mechanics and enthusiasts with basic engine assembly experience.
Warranty. The product includes a manufacturer’s limited 90-day warranty, providing coverage against defects in materials and workmanship.
Application. Specifically designed for GM LS Gen III and IV engines equipped with LS3/L92 style rectangular port cylinder heads. Intended for racing use only and may require verification for direct fitment on vehicles such as the 2008 6.2L Tahoe, especially regarding emissions compliance and carbureted or compatible throttle body EFI setups.
Holley 300-129
CA Residents: WARNING: Cancer and Reproductive Harm
- All GM LS Gen III Or IV Engines Equipped With LS3/LS92 Style Rectangular Port Cylinder Heads
- Legal For Sale Or Use On Racing Use Only Vehicles
- Dual Plane Design Perfect For Low End Torque And Pulls To 6,500 RPM
- O-Ring Cylinder Head Mounting Flange Gaskets Provide OEM Style Seal
- Optimized Runner Layout And Constant Cross Sectional Area Provide Broad Torque Curve
- Port Size 2.454 Inches Height By 1.09 Inches Wide
- 1500 To 6500 RPM Power Band
- Includes Viton® O-Rings
- Weighs 14.56 Pounds
- Front Height 5.07 Inches From Front Lifter Valley Cover To Carb Mounting Flange
- 4150 Square Bore Carb Mounting Flange
- Minimum Carb Flange Height Fits Vehicles With Minimal Or No Hood Modifications
- Rear Height 6.14 Inches From Rear Lifter Valley Cover To Carb Mounting Flange
- Suitable For Carbureted Or Compatible Throttle Body EFI Applications Using Carb-Style Flanges
- Cast Aluminum Construction With Efficient Casting Design For Light Weight And Improved Quality
- Vacuum Ports Included
- Single Carburetor Compatibility
- Throttle Body Bore Diameter 3.6 Inches
- Emissions Code 4 – Racing Use Only, Not Legal For Emissions-Controlled Vehicles
- Manufacturer’s Limited 90 Day Warranty
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