Ford 5.0L EFI GT40 1/2" Intake Manifold Phenolic Spacer

• 1/2" phenolic spacer reduces heat soak between GT40 intake and heads.

• Includes gaskets and mounting hardware — longer bolts may be needed.

• Fits 1993-1995 Mustang GT/Cobra and 1993-94 Explorer/Mountaineer 5.0L GT40.

• GT40 upper/lower intake only — not for standard EFI or carbureted setups.

The TSP Ford 5.0L EFI GT40 1/2" Phenolic Spacer installs between the GT40 upper and lower intake manifold sections on the Ford 5.0L (4.9L / 302 CID) EFI small block Windsor V8. Phenolic plastic construction insulates the upper intake from engine heat, helping reduce intake charge temperature for more consistent throttle response.

This spacer is specific to vehicles running a factory GT40 upper/lower intake manifold — it is not compatible with standard EFI upper intake manifolds or carbureted applications. The GT40 intake was factory-installed on the 1993-1995 Ford Mustang GT and Cobra, and the 1993-1994 Ford Explorer and Mercury Mountaineer, all with the 5.0L.

The kit includes the spacer, two gaskets, and mounting hardware. Adding 1/2" of height may require longer intake manifold bolts, so bolt length should be verified before final assembly, along with hood clearance once the spacer is installed.

Heat Isolation
Phenolic plastic resists heat transfer far better than aluminum, insulating the upper intake from engine heat and helping keep intake charge temperature down — the core purpose of this spacer.

Installation
Includes spacer, two gaskets, and mounting hardware. Longer intake manifold bolts may be required after installation — verify bolt length before final assembly, and confirm hood clearance with the added 1/2" of height.

What does this 1/2-inch spacer do?
This 1/2-inch phenolic spacer installs between the GT40 upper and lower intake manifold sections, creating a thermal barrier that reduces heat transfer from the engine into the upper intake. This helps minimize heat soak and maintain cooler intake air temperatures.

Will this fit my 5.0L Mustang if it doesn't have the GT40 intake?
No. This spacer is designed specifically for factory-style GT40 upper and lower intake manifolds. It is not compatible with the standard EFI intake manifold or carbureted intake manifolds.

Do I need longer bolts to install this?
Possibly. Adding a 1/2-inch spacer increases the distance between the upper and lower intake manifolds, so longer mounting bolts may be required. Verify bolt length before final assembly.

Which vehicles came with the GT40 intake from the factory?
Factory GT40 intake manifolds were used on the 1993–1995 Ford Mustang Cobra, 1993–1995 Ford Mustang GT (as applicable to this intake configuration), and 1993–1994 Ford Explorer and Mercury Mountaineer equipped with the 5.0L V8. Verify your intake manifold style before ordering.

What's the difference between the 1/2-inch and 1-inch version of this spacer?
Both spacers are made from the same heat-resistant phenolic material and install the same way. The primary difference is thickness. The 1-inch spacer provides additional thermal separation but requires more under-hood clearance and is more likely to require longer mounting hardware than the 1/2-inch version.

Are gaskets and hardware included?
Yes. The kit includes two intake gaskets and the required mounting hardware for installation.