Holley 300-137 Left Side Single Plane Mid Rise EFI Intake

Holley is an industry leader when it comes to GM Gen III and IV LS engine performance parts. Their LS Single Plane Mid-Rise Intake Manifolds are now available for both carbureted and EFI applications. They are ideal for higher horsepower engines as well as those that are incorporating power adders such as forced induction or nitrous oxide. Thanks to Holley's advanced casting technology, these intakes weigh in at only 11.5 lbs. The runner design of the intake manifold features a constant cross sectional area and is ideal for a broad power band from 2,500-7,000 RPM. They feature consistent wall thickness throughout for balanced performance and sealing strength. This excellent design also features the lowest carb mounting flange height possible without sacrificing any power. Features: Designed for performance minded LS engines with a 2,500-7,000 rpm power band Cast aluminum construction with consistent wall thickness throughout and strong mounting flanges Constant cross sectional area produces a broad torque curve Accepts a carburetor/throttle body with a Holley 4150 square bore flange Available with machined ports for EFI installation, no fabrication required The lowest carb flange height possible for improved hood clearance Matching black anodized billet fuel rails available separately for EFI manifolds Ideal manifold for centrifugal blower, turbocharger or nitrous power adders

• RPM Range: 2,500 - 7,000
• Port Size: 2.66"H x 0.92"W
• Carb Mounting Flange Height from Lifter Valley Cover Flange: 4.95"
• Vacuum Port Thread: 3/8" NPT
• MAP Sensor Port Thread: 1/8" NPT