Stainless Works 2021-23 F-150 5.0L Catback Factory Redline (part # FT21CBYUBR), built from 304 stainless steel by Stainless Works in Streetsboro, Ohio.
304 Stainless Steel
TIG Welded
2021–25 F-150 5.0L
Catback Exhaust
Lifetime Warranty
Made in USA
Overview
Improve the sound of your 2021–25 F-150 5.0L with a premium catback exhaust system from Stainless Works. Available in Legend or Redline Series, this 3" exhaust system is designed with multiple exit positions and tip styles to match your personal style.
Choose from Front of Tire Exit (Lightning) with double wall polished tips, Behind Tire Exit with single wall polished tips, or Under Rear Bumper Exit with double wall blackout tips — which also fits Shelby and Roush editions.
Featuring corrosion-resistant 304 stainless steel and TIG welded at our state-of-the-art facility in Streetsboro, Ohio — engineered for long-term durability and performance.
Why Stainless Works
- American-made from raw material to finished product
- TIG welded by skilled craftsmen for strength and beauty
- Lifetime warranty on material and craftsmanship
- Direct bolt-on fit for 2021–25 F-150 5.0L
- Factory Connection Point for easy installation
Key Features
Legend or Redline Series
Choose your preferred sound profile for the perfect F-150 tone.
3" Catback System
Full 3" diameter for maximum exhaust flow and performance.
Multiple Exit & Tip Options
Front of Tire (Lightning), Behind Tire, or Under Bumper exit.
Polished or Blackout Tips
Double wall polished, single wall polished, or double wall blackout.
Mandrel Bent Tubing
Smooth airflow with zero restriction bends.
TIG Welded Construction
Precision welds for maximum durability.
Specifications
| Vehicle Fitment |
2021–25 Ford F-150 5.0LÂ
This is not compatible with the Tremor trim level
|
| System Type |
Catback Exhaust — Legend or Redline Series |
| Diameter |
3" |
| Connection |
Factory Connection Point |
| Exit Options |
Front of Tire (Lightning) — Behind Tire — Under Rear Bumper |
| Tip Styles |
Front of Tire: Double Wall Polished
Behind Tire: Single Wall Polished
Under Bumper: Double Wall Blackout |
| Shelby/Roush Compatibility |
Under Bumper Exit fits Shelby and Roush Editions |
| Material |
304 Stainless Steel |
| Welding |
TIG Welded |
| Warranty |
Lifetime |
| Origin |
Made in USA — Streetsboro, Ohio |
⇩ Download Installation Instructions (PDF)
What's In The Box
- Inlet Pipe
- Muffler Assembly
- Front Tail Pipe
- Rear Tail Pipe
- Exhaust Tips x2
- Hanger Assembly
- AccuSeal Clamps x5
- Rubber Exhaust Grommet
- 55mm Long Bolts x2
- 35mm Long Bolts x3
- Flat Washers x8
- Lock Washers x2
- Lock Nuts x3
- Clip Nuts x2
- Flange
- Installation Instructions
Frequently Asked Questions
Will this catback fit my 2021–25 F-150 5.0L?
Yes. This catback exhaust is designed specifically for the 2021–2025 Ford F-150 with the 5.0L engine. It is a direct bolt-on system that connects to the factory connection point.
What is the difference between Legend and Redline Series?
Both series are engineered to deliver an aggressive exhaust note. The Legend Series offers a classic muscle car tone with a deep, refined sound. The Redline Series delivers a more aggressive, race-inspired sound profile for maximum attitude.
What exit and tip options are available?
Front of Tire (Lightning) exit features double wall polished tips. Behind Tire exit features single wall polished tips. Under Rear Bumper exit features double wall blackout tips and fits Shelby and Roush editions.
What warranty is included?
Stainless Works provides a lifetime warranty on material and craftsmanship — covering the full life of the product, not just a limited term.
Questions? Call us at | Mon–Fri 7:30am–4:30pm EST
Built To Order in 4 Weeks — Free Shipping on Orders $50+
This Listing
- Brand: Stainless Works
- Part number: FT21CBYUBR
- Product type: Cat-back exhaust
- Fitment: 2021-23 F-150 5.0L
- Configuration: Stock Manifolds (Factory Connect), Redline (Most Aggressive), Under Rear Bumper
- Shipping weight: 73 lb
California Prop 65 warning applies to this product.
Fitment note: Stainless Works systems are application-specific (year, cab/bed, transmission and factory exhaust). Send us your VIN before ordering and we will confirm fitment: 954-507-6261 or sales@americanmuscleperformance.net.
