Corsa 24-25 Silverado/GMC 6.2L Sport 3.0 in Cat-Back

Sport 3.0-Inch DRE Cat-Back with Valve Simulator for 2019-2025 Silverado and GMC Sierra 6.2L V8

The Corsa 21033-1 is a Sport 3.0-inch dual rear exit cat-back exhaust system engineered for the 2019-2025 Chevrolet Silverado 1500 and GMC Sierra 1500 (including Sierra Denali) equipped with the 6.2L V8 in Double Cab Standard Bed and Crew Cab Short Bed configurations at 147.5-inch wheelbase. This system delivers a measured 47 percent increase in exhaust flow over the factory system and is dyno-proven to add 17 horsepower and 16 lb-ft of torque at the rear wheels. Corsa RSC (Reflective Sound Cancellation) technology targets and eliminates the drone frequencies that plague V8 trucks at cruise while delivering an aggressive, authoritative exhaust note at full throttle. The 21033-1 reuses the factory tip bezels for a clean, OEM-look exit, and includes a valve simulator module to maintain proper signal to the factory active exhaust controller. This system is also confirmed compatible with the Max Tow Package. Engineered and manufactured in the USA, backed by Corsa's Lifetime Warranty.

Key Features

• Corsa 21033-1 Sport 3.0-inch DRE cat-back for 2019-2025 Silverado/Sierra 1500 6.2L V8 147.5in WB
• Dyno-proven gains of 17 HP and 16 lb-ft torque at the rear wheels
• 47 percent flow increase over the factory exhaust system
• Corsa RSC technology eliminates drone at cruise while delivering Sport-level sound under power
• Includes valve simulator module to maintain factory active exhaust system functionality
• Reuses factory OEM tip bezels for a clean, integrated appearance
• Compatible with Max Tow Package (confirmed as of 9/14/2022)
• 3.0-inch primary piping that tapers to 2.5-inch downstream
• Dual rear exit configuration for an aggressive look without tip upgrades
• Engineered and manufactured in the USA
• Lifetime Warranty

Fitment

Specifications

What's Included

• Corsa 21033-1 cat-back exhaust system (all pipe sections)
• Valve simulator module for factory active exhaust compatibility
• All clamps, hardware, and gaskets required for installation
• Installation instructions

Frequently Asked Questions

The Corsa 21033-1 fits 2019-2025 Chevrolet Silverado 1500 and GMC Sierra 1500 (including Sierra Denali) trucks equipped with the 6.2L V8, in either Double Cab Standard Bed or Crew Cab Short Bed configuration at 147.5-inch wheelbase. Verify your wheelbase and cab/bed combination before ordering, as Corsa offers separate part numbers for other configurations.

Yes. The 21033-1 includes a valve simulator module that sends the correct signal to the factory active exhaust controller, maintaining full OEM driving mode functionality. No warning lights or error codes result from removing the factory exhaust valve assembly.

Corsa dyno testing shows gains of 17 horsepower and 16 lb-ft of torque at the rear wheels on the 6.2L V8 Silverado/Sierra. These gains result from the 47 percent flow increase over the stock system, which reduces backpressure and improves exhaust scavenging at higher RPM.

No. The 21033-1 is designed to reuse the factory OEM tip bezels for a clean, integrated appearance that blends with the stock rear bumper cutouts. If you prefer aftermarket tips, Corsa offers other 21033 variants with tip upgrades.

Yes. As of September 14, 2022, Corsa confirmed that the 21033-1 fits Silverado and Sierra 1500 trucks equipped with the Max Tow Package without modification.

RSC stands for Reflective Sound Cancellation. Corsa engineers tune each system to identify and cancel the specific frequencies that cause interior drone at highway cruise, without restricting flow or reducing exhaust note under power. The 21033-1 Sport system produces an aggressive V8 rumble under acceleration while staying completely drone-free at steady highway speeds.

Yes. Corsa lists the 21033-1 as compatible with the 2019-2025 model year Silverado 1500 and Sierra 1500 in the specified cab, bed, wheelbase, and engine configuration. Always verify fitment on Corsa's website for the most current model year coverage.

No. The 21033-1 is a direct bolt-on replacement for the factory cat-back system. All required hardware is included. The system uses the factory tip bezel openings without any bumper modification.

Corsa backs all exhaust components with a Lifetime Warranty against defects in materials and workmanship, provided the system is installed per the included instructions and not used in racing or competition applications.

Installation Instructions

1. Allow the factory exhaust to cool completely before beginning. Work in a well-ventilated area with the vehicle safely raised on jack stands.
2. Apply penetrating oil to all factory exhaust clamp bolts and flange hardware. Allow to soak for 15 minutes.
3. Disconnect and remove the factory active exhaust valve assembly from the stock system.
4. Remove the factory cat-back exhaust system from the rear, working forward. Retain any factory hangers in good condition.
5. Connect the included valve simulator module to the factory active exhaust wiring harness.
6. Begin installing the Corsa 21033-1 from the front connection point, loosely securing all clamps and hangers before final tightening.
7. Route all pipe sections per the Corsa instructions, verifying adequate clearance from the frame, fuel tank, heat shields, and Max Tow Package components if equipped.
8. Re-install and align the factory OEM tip bezels in the rear bumper cutouts.
9. Tighten all clamps to specification from front to rear.
10. Start the engine and inspect all connection points for exhaust leaks. Verify no warning lights are present. Re-check clamp torque after the first heat cycle.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.