The aFe 49-44125-P Large Bore-HD exhaust uses mandrel-bent 409 stainless tubing and a polished 304 stainless intercooled clamp-on tip. Factory-style hangers support the over-axle and turnout sections behind the retained particulate filter. The manufacturer specifies MIG-welded construction.
For the listed 6.6L Duramax L5P diesel pickups only. Current manufacturer application rows show Chevrolet Silverado 2500 HD for 2020–2021 and 2023, with 2022 absent, while the headline and selected guide say 2020–2023. The 2022 Silverado 2500 HD application remains a source conflict requiring confirmation and is not newly mapped; no physical incompatibility is inferred from omission. Silverado 3500 HD and both GMC HD models show 2020–2023. The exact selected retailer table lists 25 named scopes through 2024; only named years within current manufacturer support are used below, with the 2022 Chevrolet 2500 gap preserved. Four 2024-only trim scopes and all 2024 extensions are held. Named-trim support is retailer evidence, not independent manufacturer approval of every trim. Match one of the four documented double/crew cab wheelbases; no regular-cab, gasoline or later-year fitment is inferred.
| Years | Make | Model | Submodel | Verification / restriction |
|---|---|---|---|---|
| 2021 | Chevrolet | Silverado 2500 HD | Custom | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2023 | Chevrolet | Silverado 2500 HD | Custom | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2020-2021 | Chevrolet | Silverado 2500 HD | High Country | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2023 | Chevrolet | Silverado 2500 HD | High Country | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2020-2021 | Chevrolet | Silverado 2500 HD | LT | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2023 | Chevrolet | Silverado 2500 HD | LT | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2020-2021 | Chevrolet | Silverado 2500 HD | LTZ | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2023 | Chevrolet | Silverado 2500 HD | LTZ | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2020-2021 | Chevrolet | Silverado 2500 HD | WT | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2023 | Chevrolet | Silverado 2500 HD | WT | Exact selected retailer named scope, clipped to current manufacturer years and documented cab/wheelbase. Chevrolet 2500 HD 2022 is held and omitted from new mapping because it is absent from the current application rows. |
| 2020-2023 | Chevrolet | Silverado 3500 HD | High Country | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | Chevrolet | Silverado 3500 HD | LT | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | Chevrolet | Silverado 3500 HD | LTZ | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | Chevrolet | Silverado 3500 HD | WT | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 2500 HD | AT4 | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2021 | GMC | Sierra 2500 HD | Base | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 2500 HD | Denali | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2022-2023 | GMC | Sierra 2500 HD | Pro | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 2500 HD | SLE | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 2500 HD | SLT | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 3500 HD | AT4 | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2021 | GMC | Sierra 3500 HD | Base | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 3500 HD | Denali | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2022-2023 | GMC | Sierra 3500 HD | Pro | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 3500 HD | SLE | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| 2020-2023 | GMC | Sierra 3500 HD | SLT | Exact selected retailer named scope within current manufacturer diesel model/engine years; documented cab/wheelbase restrictions apply. |
| Detail | Value |
|---|---|
| Manufacturer Part Number | 49-44125-P |
| Product type | DPF Back |
| Construction / exit | Five-inch mandrel-bent 409 stainless; single side turnout; MIG welded |
| Selected stainless sections | Over-axle 05-144981; tailpipe turnout 05-44769 |
| Selected polished tip | 49T50601-P161: five-inch inlet, six-inch outlet, 16-inch length; 304 stainless |
| Bands | One four-inch 05-41172 and one five-inch 05-41173 |
| Formal plugs / instruction gap | One M16 x 1.5 plug 05-46019 and one M14 x 1.5 plug 05-46020 are in the bill. The current 15-step procedure does not specify their port/application. Confirm their use for the actual cab/sensor configuration; do not substitute an older model’s plug procedure for the explicit sensor-refitting step. |
| Stock cut: double short | 149.4-inch wheelbase: six inches rearward from the DPF rear weld line |
| Stock cut: crew short | 158.9-inch wheelbase: four inches rearward from the DPF rear weld line |
| Stock cut: double long | 162.4-inch wheelbase table: 19 inches rearward from DPF rear weld line. Sensor paragraph prints 162.48 inches; confirm actual configuration rather than treating that small precision difference as another cab. |
| Stock cut: crew long | 172-inch wheelbase: 28 inches rearward from DPF rear weld line |
| Tightening / recheck | Band clamps: 40–45 ft-lb. No numerical sensor/plug torque printed. Tighten front to rear after alignment; re-tighten all clamps and hardware after 50–100 miles. |
| Clearance / emissions | At least one inch exhaust-to-spare-heat-shield clearance, plus safe clearance from wires, hoses, brake lines, body and tires. Exact manufacturer says no CARB EO number required; this is not a blanket emissions approval or permission to remove sensors. |
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
It is the five-inch 409 stainless Large Bore-HD DPF-back with one polished six-inch 304 stainless tip for the documented GM diesel trucks, installed behind the retained DPF.
What 2022 Chevrolet application needs confirmation?The current manufacturer table omits 2022 Silverado 2500 HD between 2020–2021 and 2023, despite the broader 2020–2023 headline and guide. That gap remains held and is not newly mapped. The other three HD model rows span 2020–2023.
Which four cab-specific stock cuts are printed?Measure rearward from the rear DPF weld: double short 149.4-inch wheelbase, six inches; crew short 158.9, four inches; double long 162.4, 19 inches; crew long 172, 28 inches. Support the original exhaust before under-vehicle cutting. These are stock cut locations, not dimensions to remove from the new tubes.
How are the exhaust sensors handled?Remove NOx first. Leave EGT and EPD sensors in place on the two long-bed configurations; the other documented configurations remove tail-section sensors. Step 10 explicitly reinstalls and tightens every removed NOx, EGT and EPD sensor. No sensor omission or wiring deletion is authorized.
Where do the two supplied threaded plugs go?The formal bill lists M14 and M16 plugs, but the current procedure does not specify their port or cab application. Confirm their use for the actual kit and vehicle. Do not override the explicit sensor-refitting step using another exhaust’s plug instructions.
What spare-tire clearance is required?The guide requires at least one inch between exhaust pipe and spare-tire heat shield. Also check safe clearance from wires, hoses, brake lines, body and tires; it does not print a spare-repositioning step.
Which torque applies to the clamps?The selected guide specifies 40–45 ft-lb for band clamps. It supplies no numerical sensor or plug torque, so that band figure must not be applied to those components. Keep joints adjustable until the full system is aligned.
What final checks and follow-up are specified?Tighten evenly from the front after alignment and sensor refitting. Start the vehicle, check sensors and bands for exhaust leaks and repair any cause. Remove the supports only after completion. Re-tighten all clamps and hardware after 50–100 miles.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
Shop aFe POWER intake systems, replacement filters, exhaust components, BladeRunner cooling parts and CONTROL chassis accessories at Black Ops Auto Works. Compare Momentum GT, Track Series and Magnum FORCE intake applications alongside Pro DRY S and Pro 5R filter choices. Choose a complete upgrade or a service component for the system already on your car, truck or SUV.Choose Your aFe Intake and FilterMomentum GT, Track Series and Magnum FORCECompare the intake housing, tubing, filter arrangement and finish offered for your engine. The collection includes Momentum GT applications, selected carbon-fiber Track Series systems and Magnum FORCE configurations. Each package supplies its own combination of induction components, so choose the design for the installation you want.Pro DRY S or Pro 5R Filter MediaPro DRY S uses oil-free media and skips the re-oiling step during service. Pro 5R is an oiled filter option with a different maintenance procedure. Choose a media configuration aFe off...
View aFe Products
Shop Chevrolet Silverado 2500 HD parts for suspension work, Duramax service, exhaust projects and truck accessories at Black Ops Auto Works. Compare Bilstein, FOX and ICON suspension references, Exergy fuel-system choices, Wehrli cooling components and bed protection. Select parts around your generation, engine and work requirements.Bilstein, FOX and ICON SuspensionBilstein front reservoir and rear-shock references specify GM HD applications and ride-height requirements. FOX, King and ICON choices cover separate production ranges and suspension arrangements, with ICON also listing upper arms, tie rods and torsion-key components. Match chassis, drive configuration, current height and the complete system before comparing packages.Duramax Fuel and Cooling ComponentsChoose stock-replacement fueling when the goal is an application-matched service repair: the Exergy E02 10701 L5P set supplies eight new stock-replacement injectors, while increased-output injector choices belong to a separa...
View Chevrolet Silverado 2500 HD Parts and Accessories Products
Explore Chevrolet Silverado 3500 HD parts for suspension projects, Duramax service, exhaust work and truck accessories at Black Ops Auto Works. Compare Bilstein, FOX and ICON suspension references, Exergy fuel-system options, Wehrli cooling components and Husky bed protection around your truck configuration.Suspension for the Installed HD ChassisDecide whether the priority is damping, unloaded ride quality or load support before buying suspension parts. The listed ICON SRW rear leaf pack is a replacement spring option for trucks that do not regularly carry heavy loads; it maintains factory rear height and has specific overload-leaf instructions for 3500 HD installations. It excludes dually and cab-and-chassis models, and springs are sold individually. Match the exact application before comparing that ride-focused choice with Bilstein, FOX or ICON damper packages. Shock and spring orders have different contents.Duramax Fuel and Cooling ComponentsExergy L5P pump and injector reference...
View Chevrolet Silverado 3500 HD Parts and Accessories Products
Explore Chevrolet Silverado parts and accessories for your next truck project at Black Ops Auto Works. Compare intake and exhaust options, suspension systems, brake-service parts, running boards, floor protection and bed accessories. Start with the correct 1500, HD or EV application, then narrow the choices to your truck’s engine and body configuration.Intake and Exhaust Choices by EngineChoose the project by what it changes. A K&N intake replaces the supported engine’s inlet assembly and brings its own filter-care routine; BBK shorty headers serve a different exhaust section from a Borla cat-back. Gasoline V6, V8 and turbo-four applications are separate choices. A MagnaFlow HD filter-back belongs to its supported diesel exhaust layout, while the Silverado EV has no gasoline intake or combustion exhaust to modify. Open the matching truck collection before comparing sound, materials and installation scope.Suspension for 1500 and HD ProjectsBilstein references distinguish replacem...
View Chevrolet Silverado Parts & Accessories Products
Shop DPF-back and filter-back exhaust references at Black Ops Auto Works from MBRP, aFe, MagnaFlow, Diamond Eye and Roush. Compare diesel pickup, Jeep EcoDiesel, Titan XD and Sprinter applications by the exact exhaust layout. Choose the material, outlet arrangement and supplied sections for the vehicle actually fitted.Understand the System BoundaryA DPF-back section starts downstream of the diesel particulate filter rather than replacing the filter itself. Confirm the actual connection and retained DPF/SCR/other aftertreatment arrangement using the exact kit diagram; modern diesel exhaust layouts differ.Some listings separately name a downpipe within a combination package. Review every supplied section rather than assuming all products under this category have one identical boundary. Retain the equipment required for the supported configuration and review the manufacturer’s intended-use information.Match Engine Generation, Cab and WheelbaseThe selection distinguishes Duramax generat...
View DPF Back Products
Shop performance exhaust systems, cat-backs, axle-backs, headers, mufflers, and exhaust tips at Black Ops Auto Works. Compare options from Borla, CORSA, Solo Performance, AWE, MagnaFlow, MBRP, Kooks, Akrapovic, Invidia, and other brands. Find complete systems and individual components for muscle cars, performance SUVs, trucks, imports, and European vehicles. Cat-Back and Axle-Back Exhaust Systems Choose the exhaust section that matches your project. Cat-back systems generally replace the exhaust downstream of the catalytic converter, while axle-back systems replace the rear section. Exact connection points and package contents vary by vehicle. Compare muffler design, pipe diameter, exit location, tip configuration, and compatibility with existing exhaust components. Exhaust for HEMI, SRT, Trackhawk, and Hellcat Vehicles This collection includes exhaust options for selected Jeep Grand Cherokee SRT and Trackhawk, Dodge Durango SRT and Hellcat, Dodge Charger, Chrysler 300, and Ram appl...
View Exhaust Systems Products
Shop GMC Sierra 2500 HD suspension, truck protection, brake and engine-service parts at Black Ops Auto Works. Compare FOX, Bilstein and ICON chassis options, Fleece and Wehrli components, and bed or cabin accessories. Identify the exact generation, engine, cab, bed and factory equipment to build the order.HD Suspension and Steering ChoicesCompare FOX, Bilstein, ICON and King shocks by full production coverage, axle position, adjustment arrangement and supported ride height. Match the chassis, factory suspension, mounts and operating requirements before choosing dampers. Review ICON arms, torsion keys, tie rods, leaf packs and electronic-control or installation components as a supported combination. Check single- or dual-rear-wheel restrictions wherever specified.Diesel Service and Exhaust ApplicationsChoose Fleece, Wehrli and Exergy pumps, injectors or coolant components by engine code, fuel-system version, controls and installation interfaces. Review a pump, injector set and servic...
View GMC Sierra 2500 HD Parts and Accessories Products
Shop GMC Sierra 3500 HD suspension, truck protection, engine-service and brake parts at Black Ops Auto Works. Compare FOX, Bilstein and ICON shocks, Fleece and Wehrli diesel components, Husky protection and other project options. Identify the generation, engine, cab, bed and single- or dual-rear-wheel configuration first.Suspension Systems and Brake ServiceChoose shocks by complete production coverage, axle position, supported ride height, adjustment arrangement, mounts and operating dimensions. Review ICON arms, torsion keys, tie rods, leaf packs and control or installation parts as a supported combination, including any SRW restrictions. For a Firestone air-spring package, check full chassis application and mounting requirements. Match PowerStop pads, kits and side-specific rotors to axle, side and installed brake dimensions.Diesel Service and Exhaust OptionsCompare Fleece, Wehrli and Exergy components by exact engine code, fuel and control version, coolant or turbo interfaces and...
View GMC Sierra 3500 HD Parts and Accessories Products
