CORSA 14321 Sport Axle-Back Exhaust for 2013-14 Ford Mustang Shelby GT500 5.8L

Vehicle Fitment

• 2013-2014 Ford Mustang Shelby GT500 (5.8L V8, RWD)

Features

• 3.0" mandrel-bent stainless steel axle-back system for max flow
• Dual rear exit with twin 4.0" polished Pro-Series tips
• Patented RSC® tech for aggressive tone under load, drone-free cruise
• +16 hp and +21 lb-ft torque gains vs stock
• Approximately 43% increase in exhaust flow and ~6 lb weight reduction
• Straight-through chambered mufflers for performance and sound
• 50-state emissions legal - no interference with factory cats
• Limited lifetime warranty and USA-built durability

Specifications

• Material: 304 stainless steel
• Pipe diameter: 3.0" mandrel-bent
• Tip size: Twin 4.0" polished Pro-Series
• Muffler design: Chambered, RSC® technology
• Weight savings: ~6 lb lighter than stock
• Flow improvement: ~43% over OEM
• Drivetrain: Rear-wheel drive only
• Fitment years: 2013-2014 only

Included Components

• 1x Left muffler assembly
• 1x Right muffler assembly
• 2x 4.0" polished Pro-Series stainless steel tips
• 1x Hardware installation kit (clamps & bolts)
• 1x Printed installation instructions

Product Description

The CORSA Performance 14321 Sport Axle-Back Exhaust is a direct-fit system engineered specifically for the 2013-2014 Ford Mustang Shelby GT500 5.8L. Constructed from premium 304 stainless steel with 3.0" mandrel-bent piping, this axle-back significantly improves exhaust flow - up to 43% over stock - while dropping approximately 6 pounds from your car's rear end.

Featuring mirrored twin 4.0" polished Pro-Series tips and CORSA's patented RSC® technology, the system delivers an exhilarating, aggressive exhaust note under acceleration with no drone at cruising speeds. Expect gains of around +16 hp and +21 lb-ft torque in a bolt-on package that preserves factory emissions compliance - no need for welding or cutting.

Carrying a limited lifetime warranty and made proudly in the USA, the 14321 is ideal for GT500 owners seeking exhilarating performance and bold sound. Fitment is confirmed strictly for the 2013-2014 model years; 2015-2025 compatibility is unconfirmed and not recommended for other Mustang trims or drivetrain configurations.