Size Chart
×
Built for Bronco owners who drive on pavement and trail alike, this Thermal R&D catback replaces the restrictive factory system on the 2021 and newer Ford Bronco 4Dr with a full 3 inch T304 stainless steel design. The B911-C911 keeps the frame hugging, high clearance routing of the factory exhaust so off road geometry is never sacrificed, while a true Helmholtz resonator delivers a deeper, more aggressive tone with no added cabin drone.
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2021-2025 | Ford | Bronco | 4Dr 2.7L |
| Detail | Value |
|---|---|
| Manufacturer Part Number | B911-C911 |
| Brand | Thermal R&D (Thermal Research and Development) |
| System Type | Catback exhaust |
| Pipe Diameter | 3 inch |
| Material | T304 stainless steel, mandrel bent |
| Tubing Finish | Mill finish |
| Exit Style | Slant cut, tips sold separately |
| Installation | Bolt on, no cutting or welding required |
| Warranty | Lifetime warranty |
Thermal R&D designs and manufactures its exhaust systems in the USA, focusing on true bolt on fitment and drone free sound through proprietary Helmholtz resonator tuning. The B911-C911 continues that philosophy for the Bronco platform, giving off road focused owners a system that will not compromise ground clearance or daily livability.
The B911-C911 is a full 3 inch T304 stainless steel catback exhaust system built by Thermal R&D for the 2021 and newer Ford Bronco 4Dr with the 2.7L EcoBoost engine.
Does this system come with exhaust tips?No, tips are sold separately in polished or ceramic coated finishes so you can match the look you want for your Bronco.
Will this exhaust reduce my ground clearance for off roading?No, the system is designed to hug the frame and preserve the factory high clearance routing so off road capability is not affected.
Is there any drone at highway speed?The built in Helmholtz resonator is specifically tuned to eliminate cabin drone while still delivering a noticeably deeper exhaust note.
Do I need to modify my Bronco to install this system?No cutting, drilling, or welding is required, the system bolts directly to the OEM catalytic converters and factory hangers.
Can I install the B911-C911 myself in my driveway?Yes, most owners can complete the installation at home with basic hand tools and a way to safely lift the vehicle.
Does installing this exhaust affect emissions compliance?No, the system does not alter the OEM catalytic converters or any other emissions components.
What is your return policy on this exhaust system?Unused systems in original packaging can be returned within our standard return window, contact us first so we can provide return instructions.
A catback exhaust system replaces everything from the catalytic converter back, covering the mid pipe, muffler, and tailpipe section in one bolt on upgrade. This collection covers catback systems for trucks, Jeeps, muscle cars, imports, and performance SUVs, giving you a straightforward way to improve sound, exhaust flow, and rear end styling without touching the factory catalytic converters or front pipe. Catback systems are available in stainless steel and titanium construction, with dual rear exit, single exit, and quad tip configurations, and a range of sound levels from mild touring tone to aggressive track character. Whether you want a deeper daily driver sound or a full track ready exhaust note, you will find a matched system for your platform here. What This Category Covers This collection includes complete catback exhaust systems, cat-back kits, dual rear exit systems, axle back adjacent catback upgrades, stainless steel and titanium exhaust systems, and street, tourin...
View Catback Products
Performance exhaust systems for cars, trucks, SUVs, and Jeeps are stocked at Black Ops Auto Works. Shop cat-back systems, axle-back systems, turbo-back systems, headers, downpipes, mid-pipes, mufflers, resonators, catalytic converters, exhaust tips, exhaust valve controllers, oxygen sensors, exhaust brakes, and motorcycle and powersports exhausts for Mustang, Camaro, Challenger, Corvette, Silverado, and Super Duty platforms. Every product is filterable by exhaust position, material, pipe diameter, and vehicle year, make, model, and trim so the correct fitment ships the first time. Black Ops Auto Works carries 7,441 exhaust SKUs across every position of the exhaust system. What This Category Covers Exhaust upgrades change sound, appearance, and in some cases power. Exhaust fitment depends on engine, drivetrain, and factory exit position, so confirm the exact platform before ordering any exhaust component. Exhaust Position Cat-back, axle-back, turbo-back, and header-back systems e...
View Exhaust Systems Products
Ford Bronco parts and accessories for the 2-door, 4-door, Bronco Raptor, and classic Bronco are stocked at Black Ops Auto Works. Shop lift kits, coilovers, shocks, springs, upper control arms, sway bar drop kits, cold air intakes, turbocharger kits, cat-back exhaust, front and rear bumpers, rock sliders, skid plates, light bars, A-pillar lights, MOLLE storage panels, and brake rotors for the 2.3L, 2.7L, and 3.0L EcoBoost engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 824 Ford Bronco SKUs across suspension, off-road protection, lighting, and performance categories. What This Collection Covers The current Ford Bronco lineup spans the 2-door, 4-door, and 3.0L Bronco Raptor, each with different suspension travel, brake sizing, and bodywork, while the classic Bronco from 1980 to 1996 uses its own separate parts pool. This collection groups parts confirmed to fit the correct...
View Ford Bronco Parts & Accessories Products
Thermal R&D performance exhaust systems bring stainless steel construction, direct fit installation, and an aggressive controlled tone to American muscle, trucks, and performance SUVs at Black Ops Auto Works. Shop cat back systems, axle back systems, section 1 exhausts, mid pipes, exhaust tips, mufflers, resonators, and hardware for Corvette, Camaro, Mustang, Charger, F 150, Silverado, Bronco, and Ram. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 62 Thermal R&D SKUs across cat back systems, axle back systems, mid pipes, tips, truck exhaust, muscle car exhaust, and fitment specific hardware. Thermal R and D Exhaust Construction Thermal R&D exhaust systems use vehicle specific layouts and corrosion resistant stainless construction. Match the product to your year, engine, body style, and factory exhaust configuration. Stainless steel fit and finish Thermal R&D ex...
View Thermal R&D Products