These MM-designed adapters modify Prothane 4.6L engine mounts to relocate a Coyote engine forward 0.7 inch. This provides clearance at the firewall to retain the CMCV vacuum motors that are standard on 2015+ Coyote engines.
Required: Prothane engine mounts (6-504 or 6-504-BL).
How do these work?
The adapter plates directly replace part of the Prothane motor mount (passenger and driver side). Each adapter plate (passenger and driver side) has an offset stud. The stud attaches the motor mount to the K-member. The offset position of the stud relocates the engine forward on the K-member.
Why do I need more clearance at the firewall?
The 2015+ Mustang GT Coyote engines have Charge Motion Control Valves (CMCV), also known as intake manifold runner controls. The manifold runners have air valves moved by vacuum motors at the back of the intake manifold. The ECU controls the movement. The purpose is to provide better idle control and higher torque at low RPMs. The GT350 intake manifold also has CMCV and vacuum motors.
The Problem
The CMCV vacuum motors on a 2015+ Coyote engine interfere with the Fox firewall (and some SN95 Mustang firewalls) when the engine is mounted in the typical location, as dictated by standard 4.6L motor mounts.
Ford Performance no longer sells production 2011-2014 Coyote engines. The crate engine they now sell is the current model year (2015+).
The Solution
MM Coyote Swap Firewall-Clearance Motor Mount Adapters. These allow easy modification of the Prothane 4.6L motor mounts to relocate the engine 0.7 inches forward from the standard location.
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