Ford Racing EFI Heat Spacer 0.5" Thick for 5.0L Mustang GT M-9486-A51

Intake manifold heat is one of the most overlooked factors limiting 5.0L Mustang GT performance. The Ford Racing EFI Heat Spacer isolates thermal energy between your upper and lower manifolds, keeping charge air cooler and denser for measurable gains in horsepower and torque. Beyond raw performance, this phenolic spacer also provides the clearance needed for modern valve cover setups without sacrificing factory bolt-on simplicity.

Manufactured from Westinghouse Type C phenolic—a material specifically engineered for thermal isolation in high-heat engine environments—this spacer delivers consistent results across 1986-1995 5.0L applications. Installation is straightforward: the part is CNC-machined for precision fitment and ships with all required hardware. Just confirm hood clearance before buttoning up, as the added 0.5-inch height is minor but worth verifying on your specific build.

• Material: Westinghouse Type C phenolic
• Thickness: 0.5 inches
• Fitment: 1986–1995 5.0L Mustang GT
• Installation: Bolt-on
• Bolts Included: Yes
• Hardware: 4x 2" and 2x 6/5" 5/16 bolts
• Origin: USA manufactured