The Corsa Xtreme valved cat-back is a 3.0 in 304 stainless steel system tuned for the supercharged 5.2L Predator V8 in the Shelby GT500 fastback. Corsa cast valve assemblies work with the factory Active Valve Exhaust and retain the OEM solenoids, delivering more than 10 dB over stock with the valves open, while No Drone RSC (Reflective Sound Cancellation) keeps the cabin quiet at cruise. Straight-through mufflers and a 3.0 in Double Helixx crossover X-pipe raise flow over the stock system. It exits through twin 5.0 in dual wall stainless steel slash cut Pro tips in a black PVD finish and bolts on in as little as one hour. Engineered and manufactured in Berea, Ohio.
Specifications
| Type | Valved Cat-Back Exhaust System |
| Sound Level | Xtreme |
| Material | 304 Stainless Steel |
| Pipe Diameter | 3.0 in |
| Exit | Dual Rear Exit |
| Tips | Twin 5.0 in Dual Wall Stainless Steel Slash Cut Pro Tips |
| Finish | Black PVD |
| Requirements | Factory Active Valve Exhaust |
| Quantity | 1 Kit |
| Part Number | 21291BLK |
| Warranty | Limited Lifetime (exhaust); 5 Years (valves) |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2022 | Ford | Mustang | Shelby GT500 |
Shipping
- Orders placed before 3 PM ET typically ship the same business day. Larger items ship within 1 to 3 business days.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Special order items follow a lead time we confirm with you individually before the order is committed.
- Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
- Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
- 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 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
- Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
- Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
- Product images may be representative. The SKU and specifications in the listing are what ships.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Returns & Refunds · Warranty