{"product_id":"afe-large-bore-hd-4in-409ss-dpf-back-exhaust-system-w-black-tip-20-gm-diesel-trucks-v8-6-6l-td-l5p","title":"aFe 49-44126-B Large Bore-HD 4IN DPF-Back Exhaust Black Tip for 20-23 GM Duramax","description":"\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 2500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Short-Bed (149.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 2500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Short-Bed (158.9\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 2500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Long-Bed (162.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 2500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Long-Bed (172\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 3500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Short-Bed (149.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 3500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Short-Bed (158.9\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 3500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Long-Bed (162.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 Chevrolet Silverado 3500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Long-Bed (172\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 2500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Short-Bed (149.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 2500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Short-Bed (158.9\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 2500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Long-Bed (162.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 2500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Long-Bed (172\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 3500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Short-Bed (149.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 3500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Short-Bed (158.9\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 3500HD, V8-6.6L (td) Duramax L5P, Double Cab \/ Long-Bed (162.4\" WB)\u003c\/li\u003e \u003cli\u003e2020-2023 GMC Sierra 3500HD, V8-6.6L (td) Duramax L5P, Crew Cab \/ Long-Bed (172\" WB)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eDoes NOT fit trucks equipped with a factory 5th wheel hitch or 5th wheel tow package.\u003c\/li\u003e \u003cli\u003eDoes NOT fit Regular Cab (Single Cab) configurations - Double Cab and Crew Cab only.\u003c\/li\u003e \u003cli\u003eSome cutting will be required during installation - refer to the included instruction sheet for cab-specific cut location details.\u003c\/li\u003e \u003cli\u003eFits both 2WD and 4WD (4x4) drivetrain configurations across all supported cab\/bed combinations.\u003c\/li\u003e \u003cli\u003eDoes not fit Cab \u0026amp; Chassis models.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eLarge Bore-HD DPF-back exhaust system purpose-built for the 2020-2023 Chevrolet Silverado 2500HD\/3500HD and GMC Sierra 2500HD\/3500HD with the 6.6L Duramax L5P diesel engine.\u003c\/li\u003e \u003cli\u003eConstructed from 4 IN mandrel-bent 409 stainless steel tubing for maximum exhaust flow, corrosion resistance, and heavy-duty durability.\u003c\/li\u003e \u003cli\u003eIntegrated mitered merge collector eliminates dead space, reducing turbulence and increasing exhaust velocity for improved horsepower, torque, and throttle response while lowering exhaust gas temperatures (EGTs).\u003c\/li\u003e \u003cli\u003eDual 5 IN diameter black 304 stainless steel intercooled clamp-on exhaust tips, each featuring a riveted aFe POWER logo plate for an aggressive, industrial appearance.\u003c\/li\u003e \u003cli\u003eIntercooled tip design helps reduce exhaust gas temperatures at the tailpipe - especially beneficial during sustained towing and hauling operations.\u003c\/li\u003e \u003cli\u003eOE-style bayonet hangers maintain stable pipe location under high-vibration and high-heat diesel operating conditions.\u003c\/li\u003e \u003cli\u003eHigh-quality band clamps and OE-style flange provide complete 360-degree sealing surface for a leak-free connection.\u003c\/li\u003e \u003cli\u003e100% MIG-welded construction for race-proven strength and long-term durability under demanding heavy-duty conditions.\u003c\/li\u003e \u003cli\u003eComputer-aided design (CAD) technology ensures precise, high-tolerance fitment across all supported cab and bed configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e \u003cli\u003ePart Number: 49-44126-B\u003c\/li\u003e \u003cli\u003eSeries: Large Bore-HD\u003c\/li\u003e \u003cli\u003eSystem Type: DPF-Back, Dual Split Side Exit\u003c\/li\u003e \u003cli\u003eTubing Material: 409 Stainless Steel\u003c\/li\u003e \u003cli\u003eTubing Diameter: 4 IN (mandrel-bent)\u003c\/li\u003e \u003cli\u003eTip Quantity: 2 (dual split side exit)\u003c\/li\u003e \u003cli\u003eTip Diameter: 5 IN (outlet)\u003c\/li\u003e \u003cli\u003eTip Style: Round, slant cut, rolled edge, intercooled clamp-on\u003c\/li\u003e \u003cli\u003eTip Material: 304 Stainless Steel\u003c\/li\u003e \u003cli\u003eTip Finish: Black powder-coated with riveted aFe POWER logo plate\u003c\/li\u003e \u003cli\u003eCollector Type: Mitered merge (anti-turbulence, low-restriction)\u003c\/li\u003e \u003cli\u003eHangers: OE-style bayonet hangers\u003c\/li\u003e \u003cli\u003eUPC: 802959603819\u003c\/li\u003e \u003cli\u003eInstallation: Cutting required; uses factory mounting locations\u003c\/li\u003e \u003cli\u003eSupported Wheelbases: 149.4\" (Double Cab\/Short-Bed), 158.9\" (Crew Cab\/Short-Bed), 162.4\" (Double Cab\/Long-Bed), 172\" (Crew Cab\/Long-Bed)\u003c\/li\u003e \u003cli\u003eCARB EO#: Not required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1x DPF-back exhaust system (4 IN mandrel-bent 409 stainless steel tubing with mitered merge collector)\u003c\/li\u003e \u003cli\u003e2x 5 IN black intercooled clamp-on exhaust tips (304 stainless steel, riveted aFe POWER logo plate)\u003c\/li\u003e \u003cli\u003e1x Hardware kit (OE-style bayonet hangers, high-quality band clamps, and necessary fasteners)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003e The aFe POWER Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust System with Black Tips (PN 49-44126-B) is engineered for the 2020-2023 Chevrolet Silverado 2500HD\/3500HD and GMC Sierra 2500HD\/3500HD equipped with the 6.6L Duramax L5P diesel engine. This system replaces the factory exhaust from the diesel particulate filter back with 4 IN mandrel-bent 409 stainless steel tubing, significantly reducing backpressure and improving exhaust gas evacuation. The integrated mitered merge collector eliminates the dead space found in conventional exhaust Y-pipe configurations, reducing turbulence and increasing exhaust velocity for gains in horsepower, torque, and throttle response - all while helping reduce exhaust gas temperatures under load.\u003c\/p\u003e\u003cp\u003e The dual split side exit configuration routes the exhaust to dual 5 IN black intercooled 304 stainless steel clamp-on tips. The intercooled tip design helps dissipate heat at the tailpipe exit, which is particularly valuable for Silverado and Sierra HD owners who spend long hours towing heavy loads or working in high-ambient-temperature environments. Each tip features a riveted aFe POWER logo plate for a bold, industrial appearance that complements the HD platform's commanding stance. OE-style bayonet hangers keep the system locked in position under the high-vibration conditions typical of diesel engine operation, and high-quality band clamps ensure a complete, leak-free 360-degree seal at every connection point.\u003c\/p\u003e\u003cp\u003e Installation requires cutting the factory exhaust pipe at the DPF outlet - specific cab-configuration cut instructions are included in the kit. The system fits all Double Cab and Crew Cab configurations of the 2020-2023 Silverado and Sierra 2500HD\/3500HD across both short-bed and long-bed wheelbases, in both 2WD and 4WD drivetrains. It will not fit trucks equipped with the factory 5th wheel hitch or Cab \u0026amp; Chassis configurations. Built to aFe POWER's exacting standards, 100% MIG-welded, and manufactured at their Corona, California facility, the Large Bore-HD 4 IN DPF-back is a proven heavy-duty exhaust upgrade for L5P Duramax owners who demand deeper diesel tone, reduced backpressure, and durable stainless steel construction built to handle the demands of America's hardest-working trucks.\u003c\/p\u003e","brand":"aFe","offers":[{"title":"Default Title","offer_id":53666867282239,"sku":"AFE49-44126-B","price":677.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/a68807bcc7c68974e9102765be7c9980.jpg?v=1781452401","url":"https:\/\/wcaperformance.com\/products\/afe-large-bore-hd-4in-409ss-dpf-back-exhaust-system-w-black-tip-20-gm-diesel-trucks-v8-6-6l-td-l5p","provider":"WCA Performance","version":"1.0","type":"link"}