Description
Upgrade the sound, appearance, and weight of your 2011-2014 Subaru WRX or STI Sedan with the FactionFab Axle-Back Exhaust featuring polished 3.5-inch twin-wall tips. Designed as a direct replacement for the heavy factory mufflers, this axle-back system provides a simple and effective way to improve the vehicle’s exhaust character while reducing weight.
The system is specifically engineered for 2011-2014 Subaru WRX and STI sedans using the stock exhaust configuration or a direct stock-replacement mid-pipe. The direct-fit design allows installation with basic hand tools and can be completed quickly without extensive modifications.
FactionFab manufactures these axle-back exhaust systems 100% in the USA using American-sourced materials and tubing. The system is constructed from 16-gauge 304 stainless steel, providing excellent durability and corrosion resistance for long-term use. Mandrel-bent tubing maintains smooth internal passages through the bends to support consistent exhaust flow.
Heavy-duty 3/8-inch laser-cut stainless-steel flanges and sturdy 1/2-inch exhaust hangers provide strength and reliable mounting. Every component is meticulously TIG welded by hand to deliver strong, precise welds and long-term durability.
The system features twin-wall polished 3.5-inch exhaust tips for a clean, performance-oriented appearance. The slip-on tip design allows the tip position to be adjusted relative to the rear bumper, giving you greater control over the final fit and appearance.
Compared with the factory mufflers, the FactionFab axle-back system weighs over 6 pounds less per side, helping reduce unnecessary weight from the rear of the vehicle.
Please Note: This axle-back exhaust is not compatible with Subaru SPT exhaust systems.
Key Features
- Designed for 2011-2014 Subaru WRX and STI Sedan
- 100% Made in the USA
- American-sourced materials and tubing
- Direct OE replacement for factory mufflers
- Muffler-delete axle-back design
- Over 6 lbs. lighter per side than the factory mufflers
- 16-gauge 304 stainless steel construction
- Mandrel-bent tubing
- 3/8-inch thick laser-cut flanges
- Heavy-duty 1/2-inch exhaust hangers
- Hand TIG-welded construction
- Twin-wall polished 3.5-inch exhaust tips
- Adjustable slip-on tip design
- Allows tip position to be fine-tuned relative to the rear bumper
- Improves exhaust sound and appearance
- Quick installation using basic hand tools
- Includes new installation hardware and gaskets
- Not compatible with SPT exhaust systems
Technical Specifications
Brand: FactionFab
Product Type: Axle-Back Exhaust
Vehicle: Subaru WRX / STI Sedan
Model Years: 2011-2014
Construction: 16-Gauge 304 Stainless Steel
Flange Thickness: 3/8 Inch
Hanger Diameter: 1/2 Inch
Exhaust Tips: Twin-Wall 3.5-Inch
Tip Finish: Polished
Tip Style: Slip-On, Adjustable
Welding: Hand TIG Welded
Manufacturing: Made in the USA
Installation: Direct OE Replacement
Fitment
Designed specifically for:
- 2011 Subaru WRX Sedan
- 2011 Subaru STI Sedan
- 2012 Subaru WRX Sedan
- 2012 Subaru STI Sedan
- 2013 Subaru WRX Sedan
- 2013 Subaru STI Sedan
- 2014 Subaru WRX Sedan
- 2014 Subaru STI Sedan
Compatible with the stock exhaust configuration or direct stock-replacement mid-pipes.
Not compatible with Subaru SPT exhaust systems.
