04/08/2026
The time has come! Our S650 Rear Diffuser pre-orders are shipping…
Batch 1, covering orders placed between December 1st and January 1st, started going out the door on April 3rd. Batch 2 is right behind it, fulfilled in the order orders were received. If you are in that window, keep an eye on your inbox.
We have said it before and we will say it again: this is the best product we have ever built. Not a close second. Here is why…
This is a true chassis-mounted rear diffuser, and that distinction matters. Four proprietary chassis mount brackets anchor it directly to the chassis of your S650, with one of those mounting points tying into the rear differential mount itself. It extends three feet underneath the rear bumper and works by eliminating the trapped airflow pocket between the spare tire well and the rear bumper cover. That trapped air creates drag and rear instability. This kills it. A 3-degree angle of attack optimizes the airflow path for maximum aerodynamic efficiency, reducing drag and increasing rear-end stability in a meaningful, measurable way.
Built from our patented Hybrid Aluminum and CNC machined in-house at our Indiana facility. No rear bumper removal required. It reuses factory mounting locations and ships with a full hardware kit and our most detailed installation guide yet. Compatible with all 2024-2026 S650 Mustangs across both dual and quad exhaust configurations, including Ecoboost, GT, and Performance Package trims. Optional rear spats available to complete the look.
If you pre-ordered, your unit is on its way. If you have not yet, new orders are open now on our website. Free shipping included!