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Thermal R&D B905-C905 2.5" Catback Exhaust — 2015-2017 Ford Mustang EcoBoost
The Thermal R&D B905-C905 is a 2.5" catback exhaust system for the 2015 through 2017 Ford Mustang EcoBoost 2.3L. Engineered and manufactured in Lancaster, California from T304 stainless steel, the B905-C905 gives the EcoBoost Mustang a genuine, throaty exhaust note that belies its four-cylinder roots. Thermal R&D's patented Helmholtz resonator technology is tuned specifically to the EcoBoost's 2.3L turbo four-cylinder exhaust pulse characteristics to eliminate the notorious highway drone that plagues many EcoBoost exhaust systems.
The B905-C905 includes a 3" downpipe adapter to accommodate various downpipe setups and exits with polished stainless tips. Installation is a direct bolt-on requiring no cutting or welding.
Key Features
- 2.5" T304 mandrel-bent stainless steel construction
- Patented Helmholtz resonator tuned for EcoBoost 2.3L
- Includes 3" downpipe adapter for compatibility with upgraded downpipes
- Polished stainless exhaust tips
- Fits 2015-2017 Ford Mustang EcoBoost 2.3L
- Direct bolt-on installation
- Made in Lancaster, California, USA
What's Included
- Thermal R&D B905-C905 catback exhaust assembly
- 3" downpipe adapter
- Polished stainless exhaust tips
- OEM-style mounting hardware and hangers
- Installation instructions
Specifications
| Specification | Detail |
|---|---|
| MPN / Part Number | B905-C905 |
| UPC | Registered with Thermal R&D |
| Material | T304 Stainless Steel |
| Pipe Diameter | 2.5" |
| Downpipe Adapter | 3" adapter included |
| Tip Finish | Polished Stainless Steel |
| Fitment | 2015-2017 Ford Mustang EcoBoost 2.3L |
| Installation | Direct bolt-on |
| Country of Origin | Made in Lancaster, CA USA |
| Warranty | Limited Lifetime to original vehicle owner |
Frequently Asked Questions
-
What years does the B905-C905 fit?
The B905-C905 fits 2015 through 2017 Ford Mustang EcoBoost models with the 2.3L turbocharged four-cylinder engine. -
Does the B905-C905 drone on the highway?
No. Thermal R&D's Helmholtz resonator is specifically tuned to eliminate the standing wave drone frequencies common in EcoBoost four-cylinder exhaust applications at highway speeds. -
Why does the B905-C905 include a 3" adapter?
The adapter allows the B905-C905 to work with both the stock downpipe and popular 3" aftermarket downpipe upgrades without requiring an additional adapter purchase. -
Does the B905-C905 fit the Mustang GT 5.0?
No. The B905-C905 is engineered specifically for the EcoBoost 2.3L. GT owners should look at the B906-C906. -
Is this a bolt-on installation?
Yes. The B905-C905 bolts directly to the factory exhaust connection with no cutting, welding, or drilling required. -
Will the B905-C905 work with my aftermarket downpipe?
Yes. The included 3" adapter accommodates popular 3" aftermarket downpipe setups in addition to the factory downpipe. -
Where is the B905-C905 made?
Lancaster, California, USA by Thermal R&D. -
What warranty is provided?
Limited Lifetime warranty to the original vehicle owner, non-transferable, excluding commercial and racing use.
Installation Instructions
Lift and support the Mustang safely. Remove the factory catback from the connection rearward. If using an aftermarket downpipe, install the included 3" adapter first. Connect the B905-C905 catback, hang the system on the OEM-style hangers, torque all hardware to specification, and align the polished tips per the instructions. Install time approximately 60 minutes. Full written instructions included.
Prop 65 Warning
WARNING: This product can expose you to chemicals including chromium and nickel compounds from combustion exhaust, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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