Holley - 300-291BK

Intake Manifold - Single-Plane Race - Square Bore - Single Plane - Aluminum - Rectangle Port - Black Ceramic - LS3 / L92 - GM LS-Series - Kit

Race Intake Manifold; Fits w/GM LS III/IV engines w/LS3/L92 Heads; 7.25 in. Front H; 7.25 Rear H; Split Single Plane; Black; Cast Construction;

The new Holley Single-Plane Race intake manifold were designed with performance in mind. They feature a race bred, two piece split feature that was previously only found on the most expensive race intakes. The manifold will fit GM LS Gen III engines with LS3/L92 heads and are intended for 4150 style square bore flanged carburetors or throttle body EFI.The LS Race single-plane intake manifold was designed for hi-performance/racing engine applications, 5.3 to 6.2+ liter displacement, and maximum engine speeds of 6000-7000 rpm, depending on the engine combination. This single-plane design provides optimal performance across the RPM spectrum while providing maximum performance up to 7000 rpm.The Holley LS Race manifold incorporates a split feature, which allows disassembly of the intake for direct access to internal plenum and port surfaces, making custom porting and matching a snap. With shoulder bolt locators and O-ring seal, reassembly is simple and precise. Technical Data‚· A-B Height - 7.25 in. (0° carb flange angle)ï‚· Port Size- 2.59 in. Height x 1.28 in. Wide‚· Carburetor Flange - Standard 4150 for up to 1-3/4 in. diameter throttle boresï‚· As-Cast Runner Cross-Sectional Area - 4.5 in² at the runner entry tapered to 3.2 in² at the flange exit

• Maximum performance race design with hood clearance consideration
• Lighter than other split race intakes
• Split feature making porting efforts easy!
• 33 to 50% the price of other split race intakes
• Captured O-ring seals at head ports and split
• Vacuum Port options include (2) 1/8, (1) 1/4, and (1) 3/8, NPT ports at the carb flange
• Black Finish