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Built To Hug The Frame And Sound Like It Means It
This catback system gives the 2.7L EcoBoost Bronco 4 Door a deeper, more aggressive exhaust note while keeping the same high clearance routing as the factory setup. Thermal R&D engineered the piping to tuck tight against the frame so departure angle and ground clearance stay exactly where off road drivers need them.
Key Features
- 3 inch mandrel bent 304 stainless steel tubing from the catalytic converter back
- Ceramic coated rear muffler option for improved heat reduction, ideal for lifted Broncos
- True Helmholtz Technology delivers an aggressive note without cabin drone
- Engineered to hug the vehicle frame, preserving factory ground clearance
- Easy DIY install using factory hangers, no drilling, cutting, or welding required
- Does not alter the OE catalytic converter or emissions components
Fitment Table
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2021-2025 | Ford | Bronco | 4 Door, 2.7L V6 |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Numbers | B912-C911-C, B911-C911-C |
| Pipe Diameter | 3 inch |
| Material | 304 Stainless Steel |
| Muffler Finish | Ceramic coated rear muffler |
| Exit Style | Slant cut |
| Drone Control | True Helmholtz Technology |
| Warranty | Lifetime |
| Country of Origin | Manufactured in the USA |
What's Included
- Mid pipe section engineered to hug the frame for ground clearance
- Ceramic coated rear muffler section
- Factory style hangers and clamps for a bolt on installation
- Exhaust tips sold separately in polished or ceramic coated finish
About Thermal R&D
Thermal R&D builds every exhaust system in the USA from 304 stainless steel and backs each one with a lifetime warranty. For the Bronco 4 Door, engineers specifically prioritized keeping the factory high clearance routing intact, since so many Bronco owners run these trucks off pavement, not just on it. The B912-C911-C and B911-C911-C variants share that same frame hugging design with different muffler and tip pairings.
Related Parts on Our Site
- Thermal R&D 2014-2019 Ford Fiesta ST Catback Exhaust
- Thermal R&D 2019-2024 RAM 1500 5.7L Hemi Catback Exhaust
FAQ
What is the B911-C911-C?The B911-C911-C is Thermal R&D's catback exhaust system for the 2021 and newer Bronco 4 Door 2.7L, built with a ceramic coated rear muffler for improved heat reduction and a cleaner look.
What is the difference between B912-C911-C and B911-C911-C?Both use the same ceramic coated rear muffler design and mid pipe routing. The B912-C911-C and B911-C911-C designation reflects different muffler and tip pairing options offered on this listing, so confirm the exact configuration at checkout if you have a preference.
Will this exhaust reduce my Bronco's ground clearance?No. Thermal R&D specifically engineered this system to hug the frame in the same location as the factory exhaust, so approach, departure, and ground clearance are not affected.
Does this fit the 2 door Bronco?This listing is for the 4 Door Bronco. Thermal R&D offers a separate version of this exhaust for the 2 Door Bronco with the same 2.7L V6.
Do I need to buy exhaust tips separately?Yes, exhaust tips for this system are sold separately in polished or ceramic coated finish so you can match your preferred look.
Will this exhaust hold up to off road use?Yes, the system is built from 304 stainless steel and tucked high on the frame specifically to withstand off road and overlanding conditions.
Does installation require cutting or welding?No. This is a bolt on installation using the factory hangers with no drilling, cutting, or welding required.
What is covered under the warranty?Thermal R&D backs this system with a lifetime warranty against manufacturing defects in materials and welds.
Install Instructions
- Raise the vehicle and support it securely, then let the factory exhaust cool completely.
- Remove the factory catback exhaust starting at the catalytic converter connection.
- Detach the factory exhaust from the rubber isolator hangers and remove it from the vehicle.
- Install the new mid pipe section, keeping it tucked tight to the frame as designed.
- Attach the ceramic coated rear muffler section to the factory hanger points.
- Install your chosen exhaust tips and align them evenly at the rear of the vehicle.
- Torque all clamps to spec, then start the engine and check every joint for leaks.
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