4500 LS SP INT EFI LS1 PORT W/FUEL RAILS

The Holley Single-Plane Race intake manifold is engineered for maximum performance, featuring a two-piece split design that allows for easy porting and modification. It utilizes shoulder bolt locators and O-ring seals for straightforward and precise disassembly and reassembly. This manifold, which includes AN-8 fuel rails, is specifically designed to fit GM LS Gen III engines equipped with cathedral port cylinder heads. It features a 4500 Dominator style carb flange, making it compatible with carburetors, EFI throttle bodies, or EFI throttle body elbows. It also includes an LS MAP sensor port and additional NPT ports for plenum vacuum or air-temp sensors. This LS Race single-plane intake manifold is intended for high-performance and racing applications, suitable for 5.3 to 6.2+ liter displacements, with or without power adders. Its large volume 4500 plenum and optimized runners are designed to provide excellent airflow for high-RPM engines, achieving maximum power at 7500-8000+ RPM.