JEGS 555-513026 Hi-Rise Intake Manifold Features:

• Improve engine performance and horsepower with this higher flowing intake manifold compared to a stock cast iron intake
• Designed to fit with popular aftermarket square bore 4150 and 4160 carburetors including Edelbrock, Holley, Quick Fuel, Proform, and more
• Fits GM Chevrolet V8 cylinder heads from 1955 through 1986
• 3000 to 7500 rpm power band for street or mild race applications
• Fabricated from cast aluminum for weight savings and improved performance
• Fits 1955-1995 Small Block Chevy 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400 V8 Engines
• Hi-Rise single-plane design provides optimum performance and fuel distribution
• Open plenum accepts 4150/4160 square bore carburetors
• Designed for racing and offroad use only
• Airgap design keeps hot engine oil away from intake runners resulting in a cooler, denser charge for more performance
• Designed for 23-degree heads with standard port location
• Center Bolt Adapter Bushings for 1957-1986 and 1987-1995 heads
• (8) Intake runner bosses cast in for nitrous or fuel injector ports
• Port exit dimensions: 1.160 in. W x 2 in. H
• Intake gasket port matching is recommended for optimum performance
• Estimated runner length - Shortest: 5.00 in.
• Estimated runner length - Longest: 6.25 in.
• Manifold height: (A) 5.875 in. +  (B) 5.875 in. divided by 2 = 5.875 in.
• Click here to determine the carburetor pad height.
• Cast in Bosses designed for nitrous fittings
• Front and Rear water outlet ports for additional cooling
• Provisions for dual distributor hold-downs
• Accepts late-model choke, water neck, AC, alternator, and HEI
• No provision for divorced or heated choke
• Brass Thermostat restrictor plate to reduce coolant flow
• Not Legal For Sale/Use On Pollution Controlled Vehicles

JEGS 555-513026 Hi-Rise Intake Manifold Notes:

• This Manifold will not fit Chevy Bowtie Heads
• Does not fit center bolt valve covers

FAQ

How much HP does an upgraded intake manifold add?

• The JEGS 513026 intake manifold enhances horsepower by optimizing airflow and fuel distribution. Actual gains depend on factors like engine configuration, but expect a noticeable performance boost for your small-block Chevy. Dyno-testing is the most accurate way to measure reliable power gains and optimize your engine's performance.

What's better, a single or dual-plane intake manifold?

• The choice between single and dual-plane depends on your application. The JEGS 513026, a high-performance small block Chevy single-plane intake manifold, suits high-revving engines for increased top-end power. It's ideal for racing and aggressive street applications.

What's the difference between high-rise and low-rise intake manifold?

• A high-rise intake, like the JEGS 513026, prioritizes top-end power, making it suitable for racing. Low-rise manifolds focus on mid-range torque for street use. The JEGS 513026 offers a high-rise design, emphasizing performance in the upper RPM range.

What is the purpose of a high-rise intake manifold?

• The JEGS 513026 high-rise intake manifold optimizes airflow at higher RPMs, enhancing top-end power. It's an excellent choice for racing applications where increased performance in the upper RPM range is crucial for success on the track.

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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