2024-2026 Ford Mustang S650 Rear Quarter Fender Flare Extensions
or as low as $17.50/mo with Affirm
An XL-extended rear quarter flare that widens the S650's hips and shields your paint from rock chips and road rash — molded to the factory body lines, no cutting, no drilling.
The S650 has the stance to pull off a wider rear — these quarter extensions give it that look without touching the body. The XL extended profile reaches further behind the rear wheels than a stock arch lip, deflecting rocks, dirt, and tire spray away from your painted quarter panels. The result reads OEM-plus: a clean, factory-correct line that fills the arch and complements wider wheels, a drop, and the rest of a serious build.
Two finishes, one shape. The Glossy Black version is molded in durable ABS for a sleek, factory-inspired look that disappears into the body. The Dry Carbon Fiber version is laid up in dry pre-preg carbon for genuine woven texture and lightweight rigidity — the upgrade for owners who want the weave to show. Both are precision-molded to the Mustang's rear quarter contours, so the gaps are tight and the transition off the factory panel is seamless.
What Sets It Apart
XL Extended Coverage
The extended rear quarter profile reaches further behind the wheel than a stock arch, throwing rocks, grit, and tire spray clear of your painted panels.
Two Real Finishes
Choose Glossy Black ABS for a clean OEM-style look, or dry pre-preg Carbon Fiber for motorsport-grade woven texture and reduced weight.
OEM-Plus Fitment
Precision-molded to the S650's factory body lines and mounting points for a gap-free, bolt-up-and-go fit that looks like it left the plant that way.
Snap-On + Bolt-On
The quarter extension snaps onto the panel; the deflector section bolts on with OEM screws. No cutting, no drilling into your sheet metal.
Non-Permanent Mounting
Automotive-grade double-sided tape seals the contact surface and lets you remove the piece for maintenance — no permanent holes left behind.
Hardware Included
Ships with the screws and tape needed for the install, so it's a straightforward fit out of the box.
On the Car
Install Notes
Technical Specs
| Spec | Detail |
|---|---|
| Brand | Function Factory Performance |
| Part Number | FF-853-V2-ABS |
| Product | Rear Quarter Fender Flare Extensions (pair + deflectors) |
| Fitment | 2024-2026 Ford Mustang S650 |
| Coverage | XL Extended rear quarter profile |
| Surface Finish | Glossy Black (ABS) or Dry Carbon Fiber |
| Material — Glossy Black | High-quality ABS plastic |
| Material — Carbon Fiber | Dry pre-preg carbon fiber |
| Installation | Snap-on + bolt-on (OEM screws + double-sided tape) |
| Drilling Required | No |
| Hardware Included | Yes |
| Installation Manual | Not included |
Honest Pricing. Real Support.
We price every option exactly where the brand sets it — no markup games — and back it with a team that knows these cars. Free ground shipping in the contiguous US.
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You'll get an instant confirmation email with your part details and invoice. We source from a network of authorized suppliers across the country, so lead times vary by brand and part type — we'll send a tracking number the moment your parts move.
Made-to-order builds — carbon fiber bodywork, fabricated systems, custom finish work — run longer than off-the-shelf items because they're built per order. You'll get progress updates throughout the build.
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