CORSA 21001GNM Active Valve Cat-Back Gunmetal Tips for 2018-2023 Mustang GT 5.0L

Vehicle Fitment

• 2018-2023 Ford Mustang GT (Fastback/Coupe, 5.0L Coyote V8, RWD, with Factory Active Valve Exhaust)

Fitment Notes

• Fits Fastback (coupe) body style only - does not fit Convertible due to additional rear suspension bracing
• For vehicles equipped with the factory Active Valve Exhaust option only - does not fit standard GT models without the active exhaust
• CORSA active valve technology maintains factory solenoids for seamless integration with all OEM driving modes
• Maintains factory quiet start functionality
• Optional CORSA Double X-Pipe (PN 14327) can be added to increase mid-section flow by an additional 23.43%

Features

• Variable sound level: Sport when valves are closed, Xtreme when valves are open - 11 dB delta across driving modes
• Patented RSC technology combined with active valve control eliminates interior drone across all sound modes
• CORSA-engineered active valves torture-tested to over 500,000 cycles for long-term reliability
• Flows 28% better than stock with valves closed and 17% better with valves open
• Mandrel-bent 3.0-inch T-304 stainless steel tubing for maximum flow and corrosion resistance
• Twin 4.0-inch dual-wall Gunmetal PVD Pro-Series tips for a stealthy, low-maintenance finish
• Bolt-on installation - no cutting or welding required; all hardware and full-color instructions included
• Warranty: Exhaust - Limited Lifetime; Valves - 5 Years

Specifications

• Part Number: 21001GNM
• System Type: Cat-Back, Dual Rear Exit
• Pipe Diameter: 3.0 inches
• Tip Style: Twin 4.0-inch Dual-Wall Gunmetal PVD Pro-Series
• Tip Quantity: 2
• Material: T-304 Stainless Steel
• Sound Level: Sport (valves closed) → Xtreme (valves open)
• Volume Delta: 11 decibels across driving modes
• Technology: Patented RSC + Active Valve Control
• Flow Increase: +28% (closed) / +17% (open) vs. stock
• Engine: 5.0L Coyote V8
• Valve Requirement: Factory Active Valve Exhaust equipped only

Included Components

• 1x 3.0-inch Cat-Back Exhaust System (T-304 Stainless Steel)
• 2x CORSA Active Valve Assemblies (uses factory solenoids)
• 2x 4.0-inch Dual-Wall Gunmetal PVD Pro-Series Tips
• 1x Hardware Kit (clamps, step-down flanges, hangers, and mounting hardware)
• 1x Full-Color Detailed Installation Instructions

Product Description

The CORSA 21001GNM is the Active Valve cat-back exhaust system for the 2018-2023 Ford Mustang GT Fastback equipped with the factory Active Valve Exhaust option. This system delivers a fully variable sound experience - Sport level when the valves are closed and Xtreme level when open - with an 11-decibel delta across driving modes. CORSA's proprietary active valve assemblies integrate directly with the Mustang's factory solenoids, preserving all OEM sound modes including quiet start, while replacing the stock mufflers with CORSA's straight-through RSC-tuned design for improved flow and a drone-free cabin experience in all configurations.

Built from mandrel-bent 3.0-inch T-304 stainless steel, the system outflows the stock exhaust by up to 28% with valves closed and 17% with valves open. The twin 4.0-inch Gunmetal PVD dual-wall Pro-Series tips deliver a refined, low-maintenance blacked-out look that's easier to keep clean than polished alternatives. Installation is a bolt-on process with step-down flanges for OEM connection and no cutting or welding required. The system carries a limited lifetime warranty on the exhaust and a 5-year warranty on the valves - fastback fitment only.