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Top Street Performance

AMC V8 Dual Plane Air Gap Aluminum Intake Manifold - Polished

AMC V8 Dual Plane Air Gap Aluminum Intake Manifold - Polished

SKU: SKU: 87531P

Regular price $660.00
Sale price $660.00 Regular price $750.00
Shipping calculated at checkout.

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Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.

Product Details

Features

  • Air-gap design reduces intake heat
  • Fits AMC 304-401 V8 engines
  • 1,500-6,500 RPM operating range
  • Polished aluminum performance construction

Description

Upgrade your AMC V8 with the Top Street Performance Polished Aluminum Dual Plane Air Gap Intake Manifold. Designed for AMC 304, 360, 390, and 401 V8 engines, this AMC air gap intake manifold is engineered to deliver cooler air charge temperatures, improved airflow efficiency, and stronger throttle response for street performance, street/strip, muscle car restoration, and weekend cruiser applications.

The advanced dual-plane air gap design helps isolate the intake runners from engine heat, reducing heat transfer into the intake manifold and allowing the incoming air/fuel mixture to remain cooler. Cooler intake temperatures can help improve combustion efficiency, increase power potential, and deliver stronger mid-range torque throughout the operating range. This makes it an excellent upgrade for enthusiasts searching for an AMC 360 performance intake, AMC 401 performance intake, AMC 4-barrel intake manifold, or AMC street performance intake manifold.

Designed to perform from 1,500 to 6,500 RPM, this AMC dual plane air gap intake manifold combines excellent low-speed drivability with improved upper-RPM airflow characteristics. The lightweight polished aluminum construction helps reduce weight while adding a show-quality appearance to your engine compartment.

Whether you're building an AMC muscle car, upgrading a carbureted AMC V8, completing a restoration project, or assembling a performance street engine, this AMC aluminum intake manifold provides the airflow, cooling benefits, and performance characteristics needed for a responsive and powerful driving experience.

 

Air Gap Intake Manifold Technology
The Top Street Performance AMC Air Gap Intake Manifold features an advanced dual-plane air gap design that helps separate the intake runners from engine heat. By reducing heat transfer into the manifold, the incoming air/fuel mixture remains cooler, helping improve combustion efficiency and overall engine performance. This design makes it an ideal upgrade for AMC 304, 360, 390, and 401 V8 engines used in street performance and street/strip applications.

Performance Benefits
Designed for a 1,500-6,500 RPM operating range, this AMC dual plane air gap intake manifold delivers strong mid-range torque, improved throttle response, and enhanced airflow efficiency. The air gap configuration helps support cooler intake temperatures while maintaining the drivability expected from a dual-plane design. Whether you're upgrading an AMC 360 performance engine or building an AMC 401 street performance combination, this intake manifold is designed to provide consistent power throughout the RPM range.

Specs

Basic Operating RPM Range1,500-6,500 RPM
Carburetor Flange Style4150 Square Bore
Carburetor Quantity1
Center Maximum Height5.110 in.
CNC PortedNo
ColorPolished
Deck HeightStandard
EGRNo
Front Maximum Height4.450 in.
Fuel System TypeCarbureted
Gasket Or Seal IncludedNo
Grade TypePerformance
Intake Port ShapeRectangle
MaterialAluminum
Rear Maximum Height5.770 in.
Single Or Dual Plane TypeDual Plane

Engine Fitment

COMPATIBLE WITH
AMC V8
• 5.0 L / 304 in3
• 5.9 L / 360 in3
• 6.4 L / 390 in3
• 6.6 L / 401 in3

COMMON VEHICLE APPLICATIONS
• AMC Javelin
• AMC AMX
• AMC Matador
• AMC Rebel
• AMC Ambassador
• Jeep vehicles equipped with AMC 304, 360, or 401 V8 engines

NOTES
• Fits AMC 304, 360, 390, and 401 V8 engines
• Designed for single 4-barrel carburetor applications
• Uses a 4150 square-bore carburetor flange
• Compatible with carbureted fuel systems
• Verify carburetor, linkage, and fuel system compatibility before installation
• Check hood clearance, distributor clearance, and accessory clearance during installation
• Intake gaskets and installation components sold separately unless otherwise specified

Q&A

What is the benefit of an air-gap intake manifold?
The air-gap design reduces heat transfer from the engine into the intake manifold, helping keep the air/fuel charge cooler for improved power and torque.

Will this fit AMC 360 and AMC 401 engines?
Yes. This intake manifold is designed for AMC 304, 360, 390, and 401 V8 engines.

What RPM range is this intake designed for?
This manifold performs best from 1,500 to 6,500 RPM.

What carburetor flange does this intake use?
It uses a 4150 square-bore carburetor flange for single 4-barrel carburetor applications.

Is this intake better than a standard dual-plane manifold?
The air-gap design helps improve mid-range and upper-RPM performance while maintaining good throttle response and street manners.

Will this intake manifold fit under a stock hood?
The manifold features a relatively low-profile design, but hood clearance should always be verified before installation.

Emissions Notice

This Top Street Performance (TSP) product is designed for racing and off-road competition use only. It is not legal for use on public roads or emissions-controlled vehicles and does not comply with federal, state, or local emissions regulations. The buyer assumes all responsibility for legal use and installation.

What is a Emissions-Controlled Vehicle?
"An emissions-controlled vehicle is any vehicle equipped with a factory-installed emissions control system designed to reduce air pollution. These systems include catalytic converters, oxygen sensors, EGR (Exhaust Gas Recirculation) valves, and diesel particulate filters (DPF). Most vehicles manufactured after 1975 are considered emissions-controlled and must comply with federal and state emissions laws when used on public roads."