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Shop the Roush 15-26 Mustang V6 / EcoBoost Black Tip Axle Back Exhaust, a genuine Roush component identified by manufacturer part number 421837-BLK. Review the verified vehicle fitment, specifications, included components, and installation requirements below before ordering.
Key Features
- Dual 4" black exhaust tips with laser-etched Roush Performance logos for a sleek, aggressive finish
- Straight-through muffler design for a deeper, more powerful exhaust note
- Mandrel-bent 304 stainless steel for durability and optimized exhaust flow
- Axle-back design — retains factory catalytic converters and emissions components
- Bolt-on installation — no cutting or welding required
Fitment
| Years | Make | Model | Submodel |
|---|---|---|---|
| 2015-2026 | Ford | Mustang |
Specifications
| Brand | Roush |
|---|---|
| Manufacturer Part Number | 421837-BLK |
| Product Type | Axle Back |
| Condition | New |
| Manufacturer Listing | 2015-2026 Roush Mustang V6 & Ecoboost Black-Tip Axle-Back Exhaust |
| Manufacturer Reference Price | $729.99 |
What's Included
The exact Roush component or kit identified by manufacturer part number 421837-BLK. Included hardware and supporting components are limited to what Roush supplies for this part number.
Brand Information
Roush Performance develops engineered performance, handling, exhaust, induction, forced-induction, and appearance products for Ford vehicles. Application and configuration must be verified by the complete Roush part number.
Related Roush Products
- Shop all Roush products
- Roush 2011-2014 Ford Mustang V8 Enhanced Sound Dual Axle-Back w/ Round Tips
- Roush 2011-2014 Ford Mustang V6 Enhanced Sound Dual Axle-Back w/ Round Tips
- Roush 2015-2017 & 2024 Ford Mustang 5.0L V8 Exhaust Kit w/ Round Tips (304SS)
Frequently Asked Questions
Will Roush 421837-BLK fit my vehicle?
Match the complete year, make, model, and submodel shown in the fitment table, then verify the engine, trim, factory equipment, emissions requirements, and all application notes.
Does this include everything required for installation?
Included components vary by exact part number. Review the Roush instructions and product details, then confirm whether calibration, specialty tools, reused factory hardware, or supporting parts are required.
Is professional installation recommended?
Professional installation is recommended for exhaust, suspension, supercharger, intake, and body components when the work requires lifting, alignment, calibration, wiring, tuning, or safety-system checks.
Installation Instructions
Follow the current Roush instructions for this exact part number. Confirm vehicle configuration, safely support the vehicle where required, protect wiring and nearby components, use specified fastener torque, complete any required alignment or calibration, and inspect operation before normal driving.
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