Ford 5.0L EFI Intake Manifold Phenolic Spacer

• 1/2" phenolic spacer reduces heat soak under the stock Ford 5.0L factory intake.

• Includes gaskets and mounting hardware — a complete, install-ready kit.

• Fits 1986-1993 Ford 5.0L EFI engines with the standard factory intake manifold.

• Phenolic plastic isolates intake air from engine heat for a cooler charge.

The TSP Ford 5.0L EFI Phenolic Spacer is a 1/2" heat-isolation spacer built for the standard factory intake manifold on 1986-1993 Ford 5.0L EFI small block Windsor V8 engines. Phenolic plastic construction limits heat transfer from the heads and block into the intake tract, helping keep incoming air cooler for more consistent throttle response and reduced heat soak.

The kit includes two gaskets and mounting hardware, so it arrives as a complete set. Before installing, confirm the throttle-body or upper-intake bolt pattern, bolt length, and port alignment against your stock intake. Because the spacer adds 1/2" of height, check hood clearance, throttle linkage travel, vacuum routing, and sensor connector reach once it's installed.

This spacer is built for the Ford small block Windsor V8 — 4.9L / 302 CID, commonly referred to as 5.0L — equipped with the standard factory intake manifold, 1986-1993. It's found in Ford Mustang, F-100, Bronco, Mercury Cougar, and Ford Fairlane applications running this engine and intake combination.

Heat Isolation
Phenolic plastic transfers far less heat than aluminum, keeping intake air closer to ambient temperature instead of absorbing heat from the heads and block — useful for reducing heat soak on stock-intake EFI setups.

Installation
Two gaskets and mounting hardware are included. Confirm bolt length and port alignment against your stock intake before final torque, and re-check hood clearance, throttle linkage, vacuum routing, and sensor connectors after the 1/2" height is added.

Is this spacer for a stock intake or a GT40 intake?
This spacer (SP8437) is designed for the standard factory 5.0L EFI intake manifold. If your engine is equipped with a GT40 upper and lower intake manifold, use the GT40-specific 1/2-inch spacer (SP8436) or 1-inch spacer (SP8438) instead.

What does this spacer do?
This 1/2-inch phenolic spacer installs beneath the stock intake manifold, creating a thermal barrier that reduces heat transfer from the cylinder heads into the intake manifold. This helps minimize heat soak and maintain cooler intake air temperatures.

Are gaskets and hardware included?
Yes. The kit includes two intake gaskets and the required mounting hardware for installation, so no additional hardware purchase is necessary.

Will a 1/2-inch spacer cause hood or throttle linkage clearance issues?
Possibly. Raising the intake manifold by 1/2 inch can affect hood clearance, throttle linkage operation, vacuum hose routing, and sensor connector reach. Verify clearance and fitment before final installation.

Why is the spacer made from phenolic instead of aluminum?
Phenolic material is an excellent thermal insulator and transfers significantly less heat than aluminum. This helps reduce heat transfer from the engine into the intake manifold, minimizing heat soak and maintaining cooler intake air temperatures.

Do I need longer bolts to install this?
Possibly. The additional 1/2-inch spacer thickness may require longer intake manifold bolts than stock. Compare the supplied hardware or your existing bolt length before final assembly to ensure proper thread engagement.