Description
Performance Intake Manifold. The Holley GM LS3/L92 Dual Plane Carbureted Intake Manifold in black is engineered to deliver excellent power across a broad RPM range, enhancing low-end torque while sustaining performance up to 6,500 RPM. It is ideal for GM LS Gen III or IV engines equipped with LS3/LS92 style rectangular port heads and provides a quick and efficient engine setup with a carburetor, perfect for street or throttle body EFI applications.
Construction and Appearance. This intake manifold is made from cast aluminum, offering a lightweight design with uniform wall thickness and enhanced casting quality. The sleek black finish adds durability and style, while Viton® O-rings ensure an OEM-style seal that guarantees ease of installation and long-lasting performance.
Installation. Installation is straightforward and requires no modification or drilling, thanks to the minimum carb flange height and O-ring style mounting flange gasket. It bolts directly onto compatible LS engines, providing a hassle-free upgrade.
Warranty. Includes a manufacturer’s limited 90-day warranty.
Application. Specifically designed to fit the 07-08 6.2L Sierra 1500 Denali, ensuring compatibility without the need for modifications.
Holley 300-129BK
CA Residents: WARNING: Cancer and Reproductive Harm
- Minimum Carb Flange Height Fits In Vehicles With Minimal Or No Hood Modifications
- Includes Viton® O-Rings For OEM-Style Sealing
- 1500-6500 RPM Power Band
- Optimized Runner Layout And Constant Cross Sectional Area Provide A Broad Torque Curve
- Cast Aluminum Construction For Lightweight Design And Consistent Wall Thickness
- Weighs 14.56 Lbs.
- Height (Rear) – 6.14″ From Rear Lifter Valley Cover To Carb Mounting Flange
- Height (Front) – 5.07″ From Front Lifter Valley Cover To Carb Mounting Flange
- Mounting Flange Gasket Type – O-Ring
- Suitable For Carbureted Or Throttle Body EFI Street Applications
- Port Size – 2.454″ Height X 1.09″ Wide
- 4150 Square Bore Carburetor Mounting Flange
- Fits 07-08 6.2L Sierra 1500 Denali






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