Fits 2005-2009 Ford Mustang Base (4.0L / V6-4.0L).

Improve the exhaust flow and acoustic profile of your 4.0L Mustang with this Borla Axle-Back exhaust system. Engineered as a direct bolt-on upgrade, this rear-section-only system replaces the restrictive factory muffler to provide a significant increase in airflow and a deeper, more aggressive tone without the weight of the OEM components. Constructed from aircraft-grade T-304 stainless steel, it is designed to withstand corrosion and heat while delivering long-term performance gains.

This system utilizes 2.5-inch CNC mandrel-bent tubing to maintain consistent diameters through every bend, eliminating backpressure. Testing shows an impressive flow rate of 724cfm, a 346cfm increase over the stock unit. The exhaust exits through a large 4-inch round, rolled, angle-cut tip featuring an embossed Borla logo and a bright chrome finish. At approximately one-third lighter than the factory system, this upgrade offers a tangible improvement in power-to-weight ratio and fuel efficiency.

• Material: High-quality T-304 stainless steel construction
• Tubing Diameter: 2.5-inch CNC mandrel-bent piping
• Tip Specification: 4-inch round, rolled, angle-cut embossed chrome tip
• Flow Rating: 724cfm (346cfm increase over stock)
• Installation: Easy bolt-on design to factory mounting points
• Manufacturer Part Number: 11751
• Warranty: Million-Mile Warranty

Fits select 2005-2009 Ford Mustang GT, Shelby GT500, and Shelby GT500KR (4.6L).

The Borla 11750 S-Type Axle-Back exhaust system is a direct-fit performance upgrade designed to deliver an aggressive sound profile without the intrusive interior drone. This system replaces the factory rear muffler section, reducing overall vehicle weight while significantly increasing exhaust flow CFM. Engineered for the 2005-2009 Mustang platform, the S-Type mufflers cancel out high-frequency sound waves to provide a deep, throaty V8 growl that complements both stock and modified engines.

Each system is built from high-quality T-304 stainless steel and features 2.5-inch mandrel-bent tubing for maximum airflow. The exhaust exits through dual 4-inch round, bright chrome-finished tips that are welded to the muffler assemblies. This axle-back kit bolts directly to the factory mounting points, making it an ideal modification for owners seeking better performance and a premium finish.

• System Type: Axle-Back (Rear Section Only)
• Muffler Series: S-Type (Aggressive Sound)
• Tubing Diameter: 2.5"
• Tip Size: 4" Round, Bright Chrome Finish
• Material: T-304 Stainless Steel
• Installation: Bolt-on to factory mounting points
• Manufacturer Part Number: 11750

Fits 2005-2008 Chevrolet Corvette Base (6.0L / 6.2L).

Upgrade your C6's acoustic profile with the Borla S-Type axle-back exhaust system. This rear-section-only kit replaces the factory mufflers with Borla's signature S-Type straight-through design, delivering a more aggressive, throatier exhaust note that characterizes the 6.0L LS2 and 6.2L LS3 V8 engines. Engineered for high-flow efficiency, this system utilizes patented technology to improve exhaust velocity while maintaining a refined cabin experience.

The 11744 system is built from premium T-304 austenitic stainless steel, providing superior corrosion resistance compared to 409 or aluminized steel. It features precision-bent tubing and mirror-polished T-304 stainless steel tips. This system is compatible with both NPP (Dual Mode) and non-NPP equipped Corvettes; however, please note that the Borla unit does not include or utilize NPP valves.

• System Type: Axle-Back (Rear Section Only)
• Series: S-Type Classic
• Material: T-304 Stainless Steel
• Fitment: Fits both NPP and non-NPP vehicles (valves not included)
• Installation: Bolt-on replacement for factory rear section
• Manufacturer Part Number: 11744
• Warranty: Million-Mile Limited Warranty

Fits 2005-2010 Scion tC (Base and Spec models).

The Borla 11743 rear section exhaust muffler is engineered to improve the exhaust flow and sound profile of your Scion tC. This system replaces the restrictive factory rear muffler, connecting directly to the OEM mid-pipe mounting points for a straightforward bolt-on installation. Unlike 409 or aluminized steel alternatives, this unit is constructed from premium T-304 austenitic stainless steel for maximum corrosion resistance and long-term durability in severe weather conditions.

• Direct bolt-on installation to factory mid-pipe
• Manufactured from high-quality T-304 austenitic stainless steel
• Polished stainless steel tip for an upgraded appearance
• Precision-engineered for weight reduction and optimized flow
• Manufacturer Part Number: 11743
• Backed by Borla's Million-Mile Warranty

Fits 1999-2005 Mazda Miata (Base, LS, SE, 10th Anniversary, Shinsen, and Mazdaspeed models).

The Borla 11732 rear section exhaust is engineered to enhance the exhaust flow and acoustic profile of the NB-generation Mazda Miata. Replacing the restrictive factory rear muffler, this bolt-on system is designed for enthusiasts seeking improved durability and a more aggressive tone without the drone associated with lower-quality exhausts.

• Premium Materials: Constructed from high-quality austenitic stainless steel for superior corrosion resistance compared to 409-grade or aluminized steel.
• Free-Flow Design: Utilizes Borla's patented technology to optimize exhaust velocity and improve performance through a more efficient flow path.
• Direct Bolt-On: Precision-manufactured to connect to the factory mid-pipe for a straightforward installation that requires no cutting or welding.
• Polished Finish: Features handsome polished stainless steel tips for a refined, performance-oriented aesthetic.
• Part Number: 11732
• Manufacturer Warranty: Supported by Borla’s million-mile warranty.