05-09 Mustang GT Rear Diffuser
05-09 Mustang GT Rear Diffuser
Description
Elevate the rear profile of the S197 with a diffuser designed for both presence and performance. Specifically engineered for the 2005–2009 Mustang GT, this custom component fills the factory void with an aggressive, track-inspired aesthetic that flows seamlessly with the iconic lines of the early fifth-gen body style.
Why Aluminum Composite (ACM)?
Cheap plastics are bypassed in favor of high-grade 6mm ACM—a three-layer sandwich featuring two sheets of aluminum bonded to a solid polyethylene core.
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Rigid Strength: Provides the structural integrity of metal at a fraction of the weight.
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Zero Sag: Unlike ABS plastic, ACM will not warp, sag, or "smile" over time.
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Heat & Weather Resistant: Built to withstand high-temperature exhaust gases and harsh road debris without cracking or fading.
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100% Rust-Proof: Engineered for longevity in all climates and driving conditions.
Key Features
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Satin Black Finish: A sleek, pre-finished coating that matches factory trim and aftermarket accents seamlessly.
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Precision Fitment: Designed specifically for the GT rear bumper for a clean, integrated look—eliminating "universal" fitment gaps.
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Aerodynamic Aesthetic: Features defined fins to give the vehicle a wider, more planted stance from the rear.
Ready Out of the Box
No complicated assembly or puzzles are required. Every diffuser ships fully pre-assembled. The fins are fastened and the components are aligned during manufacturing so that the part arrives ready to be bolted directly onto the vehicle.
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DIY Friendly: Designed to mount using existing bolt holes for the evap bracket and the bottom of the rear bumper near the exhaust tips. The diffuser includes pre-drilled holes to make alignment straightforward.
Installation & Compatibility
| Attribute | Specification |
| Fitment | 2005–2009 Ford Mustang GT Only |
| V6 Models | Does NOT fit V6 factory rear bumpers |
| Material | 6mm Premium ACM |
| Finish | UV-Resistant Satin Black |
| Hardware | Stainless Steel mounting hardware included |
Fitment Note: This diffuser is precision-contoured specifically for the GT rear bumper and will not align correctly with V6 bumper geometry. Some drilling into the bottom of the factory bumper cover is required for a secure, high-speed-rated installation. Rear Side Splitters are not included and can be purchased separately or in the listed 05-09 Mustang GT Diffuser Combo. This is the diffuser only.
05-09 Mustang GT Diffuser Installation Guide