CORSA 21098 Xtreme Variable-Sound Axle-Back Exhaust for 15-20 Mustang GT350/R

Vehicle Fitment

• 2015-2020 Ford Mustang Shelby GT350/GT350R (5.2L V8, RWD) - requires CORSA mid-pipe

Features

• 3.0" mandrel-bent 304 stainless steel piping with active valve assemblies
• Switchable Xtreme/Touring sound levels via CORSA Connect control
• Patented RSC™ technology eliminates cabin drone at cruise
• Double Helixx twin crossover X-pipe integration when paired with CORSA mid-pipe
• Up to 10% increase in exhaust flow over stock
• Approx. 8 lb lighter than OEM axle-back
• Deep, aggressive idle tone with controlled volume under throttle
• Made in USA; easy bolt-on installation with no cutting/welding
• Lifetime warranty on exhaust, 5-year warranty on valves

Specifications

• System Type: Axle-back, Quad rear exit (no tips included)
• Pipe Diameter: 3.0" mandrel-bent
• Material: 304 stainless steel
• Vehicle: 2015-2020 Shelby GT350/GT350R, 5.2L V8
• Drivetrain: RWD
• Weight Savings: ~8 lb vs stock axle-back
• Exhaust Flow Increase: ~10%
• Sound Modes: Xtreme and Touring
• Warranty: Exhaust - lifetime; valve assemblies - 5 years
• Compliance: CA Prop 65 warning applies

Included Components

• 1x CORSA axle-back exhaust assembly with active valves
• 1x Installation hardware kit (clamps, hangers)
• 1x Printed installation manual

Product Description

The CORSA Performance 21098 Xtreme Variable-Sound Axle-Back Exhaust is purpose-built for the 2015-2020 Ford Mustang Shelby GT350 and GT350R equipped with the 5.2L "Voodoo" V8 engine. Featuring a precision 3.0" mandrel-bent 304 stainless steel design and exclusive active valve assemblies, this system delivers an aggressive, deep tone on demand while maintaining a refined cruising experience thanks to CORSA's patented RSC™ drone-cancellation technology. Flow improvements of up to 10% and a weight reduction of approximately 8 lb ensure both performance gains and responsive throttle feel.

This axle-back is not a standalone upgrade - it is designed to work in conjunction with CORSA's Double Helixx mid-pipe (with X-pipe). Installation is straightforward and requires no cutting or welding. Drivers can toggle between Xtreme performance roar and Touring-level discretion via the CORSA Connect valve control. Backed by a lifetime warranty on the exhaust and 5-year coverage on valves, the 21098 delivers a fully controllable, high-performance exhaust solution tailored for GT350 enthusiasts.