Holley Single Plane Split-Design Race Intake Manifold

• Holley Single Plane Split-Design Race Intake Manifold is engineered to enhance top-end horsepower and midrange strength for LS-based engines ranging from 5.3L to 6.2L and larger combinations
• Innovative two-piece construction provides easy access to the plenum and runners for port work and custom flow matching
• Single-plane architecture tuned for optimal performance in the 6,000–7,000 RPM range, depending on the overall engine setup
• Designed to fit GM LS Gen III applications equipped with LS3 or L92-style cylinder heads and a standard 4150 square-bore carburetor flange
• Large, tapered runners help maximize airflow efficiency and support strong power output at elevated engine speeds
• Incorporates captured O-ring seals and precision shoulder bolts to aid in accurate alignment during reassembly, along with available vacuum ports for added tuning versatility
• Covered by a 90-Day Warranty

Extracting big power from an LS combination requires an intake manifold that can sustain airflow as engine speed climbs. Whether you are building a hard charging street car or a competition focused track machine, the intake must support strong midrange torque and sustained high rpm output. Designed for performance oriented 5.3L to 6.2L and larger LS engines, the Holley Single Plane Split-Design Race Intake Manifold is built with that mission in mind.

This race inspired manifold uses a two piece split construction, allowing the upper and lower sections to be separated for direct access to the plenum and runners. That design simplifies porting, blending, and custom modifications to better match specific cylinder head and engine combinations. Optimized for peak performance typically in the 6000 to 7000 rpm range, the single plane architecture promotes efficient airflow and supports strong top end horsepower. It is compatible with GM LS Gen III engines using LS3 or L92 style cylinder heads and features a 4150 square bore flange for carbureted setups or throttle body EFI applications. The as cast runners are generously proportioned and tapered to encourage smooth air movement. Vacuum ports at the carburetor flange provide added flexibility for accessories and tuning needs. Captured O ring seals at the head ports and along the split surfaces, combined with precision shoulder bolt alignment, help ensure accurate and repeatable assembly. Its lightweight design, consideration for hood clearance, and competitive positioning make it an attractive alternative to many other split race manifolds.

Engineered for racers and serious LS builders, this intake manifold brings advanced race inspired features together with practical installation and serviceability. It provides a solid platform for combinations built to rev hard and deliver results. Backed by a 90-Day Warranty.