Corsa's Xtreme cat-back is a valved 3.0 in system in 304 stainless steel tuned for the CT5-V 3.0L Turbo. It plugs directly into the factory dual mode active exhaust module, so the stock drive modes still open and close the valves and swing the car between quiet and loud, over 5 dB above stock at full song. A 3.0 in double X-pipe replaces the restrictive crushed factory piping near the rear axle to raise flow about 10 percent, and Corsa's Reflective Sound Cancellation technology keeps the cabin drone free in every mode. Dual wall 4.5 in black PVD twin tips finish the system. Backed by a Limited Lifetime exhaust warranty with 5 years on the valves.
Specifications
| Type | Cat-back exhaust, Xtreme, valved (dual rear exit) |
| Material | 304 stainless steel |
| Diameter | 3.0 in (double X-pipe) |
| Tips | 4.5 in black PVD, dual wall, twin |
| Valve | Integrates with factory active exhaust module |
| Technology | Reflective Sound Cancellation (RSC), no drone |
| Sound | Over 5 dB louder than stock |
| Warranty | Limited Lifetime exhaust, 5 year valves |
| Part Number | 21326BLK |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2025 | Cadillac | CT5-V | 3.0L Turbo |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
