Holley Performance 300-256 Race Intake Manifold

Intake Manifold

Race Intake Manifold

Race Intake Manifold; Single Plane; Split-Design; 4150 Square Bore Flange; 7.32in. Front/Rear Height; 2500-7000 RPM Band; Incl. Shoulder Bolt Locators/O-Ring Seals; Satin Finish;

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 cathedral port 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 - 7.32 in. (0° carb flange angle), Port Size- 3.28 in. Height x 1.10 in. Wide, Carburetor Flange - Standard 4150 for up to 1-3/4 in. diameter throttle bores, As-Cast Runner Cross-Sectional Area - 3.5 inA at the runner entry tapered to 2.9 inA at the flange exit

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR Sprint Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Exhaust, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.