Description
Overview
The Flowmaster Force II Axle-back Exhaust System is engineered to wake up the performance and sound hidden in your 3.7L V6-powered 2011-2014 Ford Mustang. Designed as a direct axle-back upgrade, it replaces the original rear-mounted mufflers while retaining the factory dual exhaust outlets for a clean, purposeful look that complements the Mustang’s rear fascia. If you’re after a subtle but distinctive performance note without going over the top, the Force II series hits exactly that sweet spot.
Built from mandrel-bent stainless steel, this system is designed for maximum flow and long-term durability. The smooth, mandrel-bent tubing helps preserve exhaust velocity for improved throttle response, power, and mileage, while the specially tuned pair of 60 Series Delta Flow performance mufflers deliver the signature Flowmaster tone. Large 3.50-inch polished stainless steel tips finish the setup with a bright, aggressive presence at the rear.
Sound Character
As a Force II system, it produces a moderate exterior tone paired with a mild interior tone. That balance makes it ideal for the enthusiast who wants a deeper, more distinctive exhaust note under acceleration without unwanted drone or cabin harshness during everyday driving and highway cruising.
Key Highlights
- Axle-back configuration with dual tail pipes and included 60 Series Delta Flow mufflers
- Mandrel-bent stainless steel construction for maximum performance and durability
- Large 3.50-inch polished stainless steel tips for a finished, aggressive look
- 2.25-inch inlet diameter with black pipe finish
- Moderate exterior tone, mild interior tone — subtle yet distinctive
- CARB (California) compliant, Emission Code 5
Installation & Fitment
This is a true bolt-on system built with easy fit in mind. It is designed to replace the original rear-mounted mufflers using the factory hangers and connections, so there’s no cutting or fabrication required for a straightforward home install. The kit includes everything you need to install with basic hand tools, making it an accessible weekend upgrade. It is engineered specifically for the 2011-2014 Ford Mustang with the 3.7L V6 and is configured for 2WD applications.
Please note this is a muffler kit only (Muffler Part Number: Kit Only), and a heat shield is not included. As with all Flowmaster systems, the Force II is backed by the Flowmaster Lifetime Limited Warranty, reflecting the brand’s confidence in its build quality and performance.
For Mustang owners who want factory-style dual outlets, real gains in throttle response and power, and a refined but unmistakably Flowmaster sound, the Force II Axle-back delivers a proven, bolt-on upgrade that looks and sounds the part.
