2024-2026 Ford Mustang S650 Dark Horse Style Dry Carbon Fiber Rear Bumper Diffuser
or as low as $116.67/mo with Affirm
Real dry carbon fiber, molded in the factory Dark Horse diffuser profile for the S650. It drops onto the lower rear bumper for an aggressive, finished rear end — double-sided pre-preg weave, precision fitment, no cutting.
The S650's lower rear bumper leaves a lot of flat plastic on the table. This diffuser fills it with the aggressive finned profile of the factory Dark Horse — but in genuine double-sided dry pre-preg carbon fiber, so the weave reads real from every angle instead of a printed or hydro-dipped imitation. It fits EcoBoost, GT, GT Premium, Dark Horse, and Dark Horse Premium, tucking against the factory bumper lines for an integrated, straight-from-the-order-sheet look.
Dry pre-preg carbon is cured under heat and pressure for a tighter weave, lighter weight, and better rigidity than wet-lay parts, and a UV-stable clear coat keeps the finish deep and dark through sun and weather. It bolts to the factory mounting points with no cutting, and pairs cleanly with a carbon splitter, side skirts, or spoiler when you build the rest of the car out.
What Sets It Apart
Genuine Dry Carbon Fiber
Double-sided pre-preg carbon fiber, autoclave-cured for a tight weave, real strength-to-weight, and a finish that looks the part front and back — not a wrap or a print.
Dark Horse Diffuser Profile
Molded in the aggressive finned shape of the factory Dark Horse diffuser, adding depth and motorsport presence across the whole rear bumper.
Precision OEM-Location Fit
Shaped to the S650 lower bumper contours and mounted at the factory points, so panel gaps stay tight and the diffuser sits flush and integrated.
UV-Protected Clear Coat
A UV-stable gloss clear coat locks in the weave and resists fading, yellowing, and oxidation from sun and road exposure over time.
Fits the Whole S650 Lineup
Direct fitment for 2024-2026 EcoBoost, GT, GT Premium, Dark Horse, and Dark Horse Premium — coupe and convertible.
Builds With Your Kit
Pairs cleanly with a carbon front splitter, side skirts, and rear spoiler for a cohesive full-carbon exterior package.
On the Car
Install Notes
Technical Specs
| Spec | Detail |
|---|---|
| Brand | Function Factory Performance |
| Part Number | DIFF-1163-BKCF |
| Material | Double-Sided Dry Pre-Preg Carbon Fiber |
| Weave | Gloss Twill, UV Clear Coat |
| Style | Dark Horse Rear Diffuser |
| Placement | Lower Rear Bumper Diffuser |
| Installation | Direct Bolt-On, Factory Mounting Points |
| Fitment | 2024-2026 Ford Mustang S650 (all trims) |
| Modification | None Required |
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