Best Exhaust For Diesel Trucks: Compare Mufflers and Systems

#1 · Best Overall

1. Upower 4-Inch Muffler

• Weight: 7.26 kg
• Material: Stainless Steel-Fiberglass
• Compatible with Vehicle Type: Universal

Best for: Universal 4-Inch Muffler Replacement.

Why it ranks #1: Its 4-inch inlet and outlet, 30-inch overall length, stainless-steel construction, and stated diesel muffler design make it a clearly specified truck-use option.

Its straight-through design pairs 4-inch inlet and outlet connections with a 30-inch overall length, offering a universal-format muffler that keeps the exhaust path open. The 7-by-24-inch round body and reversible ends give installers flexibility when choosing which end connects to the exhaust pipe.

The 4-inch inner-diameter inlet and outlet define the connection size, while the listing specifies no inlet-or-outlet difference, so either end can face the incoming exhaust. Its 30-inch overall length and 7-inch round body provide concrete dimensions for planning the available space. A fully welded stainless-steel construction is specified for durability, and the straight-through layout is described as avoiding exhaust-flow restriction. This is a muffler component, not a complete exhaust-system kit.

Skip it if you need a complete cat-back kit rather than a standalone muffler; the Upower listing specifies one muffler component.

This suits a buyer replacing or configuring a diesel exhaust around 4-inch connections who can use a 30-inch muffler. Check available space for its 7-inch round body; it is not a complete exhaust system.

Listed on Amazon as: Upower 4" Inlet Diesel Exhaust Muffler 7" x 24" Body 30" Whole Length XS2772 – Straight Through Stainless Steel Welded On Resonator Muffler

#2 · Best 5-Inch Muffler

2. JY Performance 5-Inch Muffler

• Weight: 11 lb
• Material: Stainless Steel
• dimensions: 31 x 8 x 8 in
• Compatible with Vehicle Type: Diesel muffler

Best for: 5-Inch Muffler With Clamps.

Why it ranks #2: This stainless-steel diesel muffler has 5-inch inlet and outlet connections, a 30-inch overall length, and includes two clamps.

Its 5-inch inlet and outlet pair with two included clamps, giving buyers a large-connection muffler and specified clamping hardware in one listing. The 30-inch overall length and 8-inch round body make its installation footprint clear, while straight-through construction defines its exhaust path.

The 5-inch inner-diameter connections identify the pipe size this muffler is specified for, and the two included clamps provide listed hardware for joining it into an exhaust setup. At 30 inches long with an 8-inch round body, it needs room for a larger muffler than compact options. TIG-welded stainless steel is specified, and the description says it absorbs unwanted interior resonance; either end can serve as inlet, supporting flexible orientation.

Skip it if you have limited room for an 8-inch-round, 30-inch muffler; its listed dimensions require space for that body.

This suits a diesel-truck owner seeking a 5-inch muffler with clamps included and room for its 8-by-24-inch body. Its larger dimensions and 5-inch connections are the key boundaries when planning the exhaust layout.

Listed on Amazon as: 5 Inch Inlet Diesel Muffler Exhaust with Clamp- 8" x 24" Body – 30" OAL

#3 · Best Cat-Back

3. MBRP S6208AL Cat-Back

• Weight: 61 lb

Best for: Single Aluminized Cat-Back System.

Why it ranks #3: The listing identifies this as a single cat-back diesel exhaust system, a useful format for buyers seeking a system rather than a standalone muffler.

The MBRP S6208AL is identified as a single cat-back diesel exhaust system made from aluminized steel, giving buyers a named system format and material to consider. Its listed 61-pound weight is also relevant when planning how to handle the system, though the supplied details do not identify a truck application.

The title specifies a cat-back diesel exhaust system, distinguishing it from a standalone muffler and identifying the section of exhaust it covers. It is described as a single system, and aluminized steel is its stated material, giving buyers two concrete selection details. At 61 pounds, the listed item weight can inform handling arrangements. No vehicle fitment, pipe diameter, installation hardware, or additional system features are supplied, so those details cannot be assumed from the model name alone.

Skip it if you need confirmed truck fitment or pipe dimensions to select a cat-back system; neither is supplied here.

This may suit a buyer seeking a single aluminized-steel cat-back diesel exhaust system who can verify the application from other reliable details. The supplied listing does not establish truck fitment, pipe size, or included installation hardware.

Listed on Amazon as: MBRP S6208AL – Aluminized Steel Cat-Back Diesel Exhaust System Single

#4 · DPF-Back System

4. MagnaFlow 17912 DPF-Back

• Weight: 60 lb
• Material: Stainless Steel

Best for: Stainless DPF-Back System Kit.

Why it ranks #4: Its listed DPF-back performance exhaust system and stainless-steel material make it a complete-system candidate, though vehicle fit details are sparse.

The DPF-back configuration is the defining detail of this MagnaFlow kit: it identifies the system section covered, while the stainless-steel specification names its material. Buyers seeking a diesel exhaust system kit rather than a standalone muffler can use those details to assess whether its scope matches their project.

The product is identified as a Performance DPF Back Exhaust System Kit, so its stated scope is the exhaust section after the diesel particulate filter rather than a muffler-only replacement. Stainless steel is the listed material, giving buyers a material specification to weigh when selecting a system. The listing supplies no vehicle application, pipe diameter, or installation details, so the kit's stated configuration alone cannot establish whether it matches a particular truck or exhaust layout.

Skip it if you need a stated truck fitment or pipe diameter before choosing; those details are not supplied for this kit.

This is for a buyer whose project calls for a stainless-steel DPF-back diesel exhaust kit. Because the listing does not identify vehicle fitment or dimensions, the stated system scope may not settle compatibility for your truck.

Listed on Amazon as: MagnaFlow Performance DPF Back Exhaust System Kit 17912

#5

5. Diamond Eye K4110A-RP

• Weight: 62 lb
• Material: Aluminum
• dimensions: 52 x 13 x 21 in
• Compatible with Vehicle Type: Car

Best for: Muffler-Free Duramax Cat-Back.

Why it ranks #5: This is a 4-inch cat-back diesel exhaust for Duramax applications, but the listing specifies aluminized material and no muffler.

The 4-inch cat-back layout is listed without a muffler, making this Diamond Eye system a specific option for Duramax buyers seeking an exhaust section that omits that component. Its aluminized construction distinguishes it from stainless-steel choices, while the 4-inch outlet size gives a concrete connection specification.

This is a cat-back exhaust with a 4-inch outlet, giving buyers a defined system section and outlet dimension to compare with their existing exhaust plan. The title explicitly says no muffler, so it suits projects where a muffler is not part of the desired setup; it is a poor match for someone seeking a muffled replacement. Aluminized material is specified, and the listing identifies Duramax in the title, but does not provide a more precise truck fitment.

Skip it if you want a muffled cat-back setup; this Diamond Eye listing explicitly specifies no muffler.

Consider it if your Duramax project calls for a 4-inch cat-back exhaust and you specifically want the no-muffler configuration. Its aluminized material and limited fitment detail make careful application matching important.

Listed on Amazon as: Diamond Eye K4110A-RP Diesel Exhaust 4" Cat Back Aluminized – No Muffler Duramax

#6

6. JFKAI QIANG 4-Inch Muffler

• Material: Alloy Steel
• dimensions: 30 x 7 x 7 in
• Compatible with Vehicle Type: Car, Truck

Best for: Truck-Oriented 4-Inch Resonator.

Why it ranks #6: The listing calls it a truck-focused diesel muffler with 4-inch inlet and outlet connections, but its material fields conflict between stainless and alloy steel.

A 4-inch straight-through resonator with a 7-by-24-inch body and 30-inch overall length gives truck owners specific connection and space dimensions to plan around. The listing describes it for diesel and truck applications, and its polished stainless-steel finish is presented as a corrosion-resistant surface for harsh conditions.

The 4-inch inlet and outlet define the pipe connections, while the 30-inch overall length and 7-by-24-inch body help determine whether the resonator fits the available exhaust space. Its straight-through design is described as supporting exhaust flow and sound performance for diesel truck systems. The listing also identifies stainless-steel construction and a polished finish, describing them as durable and corrosion resistant. It is a resonator component, not a complete exhaust-system kit.

Skip it if you need a complete exhaust-system kit rather than a single resonator; this listing specifies one muffler component.

This suits a truck owner seeking a 4-inch straight-through resonator and able to accommodate its 30-inch length. Treat it as a component purchase, and use the listed dimensions when planning the exhaust space.

Listed on Amazon as: 4 Inch Diesel Muffler Exhaust, 4" Inlet 4" Outlet Straight Through Resonator, 7" x 24" Body 30" OAL, Stainless Steel Muffler for Truck

#7

7. LCGP 5-Inch Muffler

• Material: Stainless Steel

Best for: Compact 5-Inch Universal Resonator.

Why it ranks #7: Its 5-inch connections and stainless-steel straight-through design suit some diesel setups, but its short 17.3-inch overall length is less broadly specified.

Its 17.3-inch overall length and 10.5-inch body make this 5-inch-inlet-and-outlet resonator a compact-format option among the listed large-diameter components. The straight-through design is described as supporting higher flow and a deep, throaty tone, while the universal designation offers a broad format rather than a named truck application.

The 5-inch inlet and outlet set the connection diameter, and the listing says there is no inlet-or-outlet difference, allowing either end to face the incoming pipe. Its 17.3-inch overall length and 6-inch round body width help buyers plan around a shorter installation envelope than a 30-inch muffler. Stainless steel is specified, and the straight-through layout is described as promoting flow and a deep, throaty tone. It is a resonator, not a complete exhaust kit.

Skip it if you need a longer 24-inch muffler body; this LCGP resonator has a 10.5-inch body.

This suits a buyer wanting a short 5-inch straight-through resonator with stainless-steel construction and room for its 17.3-inch length. Its compact body is a fit consideration if your exhaust plan calls for a longer muffler.

Listed on Amazon as: LCGP 5" Inlet Diesel Exhaust Muffler, 5" Inlet & Outlet, 5" x 10.5" Body 17.3" Whole Length Universal Resonator, Straight Through Design, Stainless Steel Mufflers Resonator

#8

8. Flowmaster 717943 FlowFX

• Weight: 46 lb
• Material: Plastic
• dimensions: 43.7 x 15.1 x 12.1 in
• Compatible with Vehicle Type: Truck

Best for: Ford Super Duty Cat-Back Upgrade.

Why it ranks #8: Although it is a stainless cat-back kit with truck-specific fitment, the listed compatible engines are 6.2L and 7.3L V8s, not identified as diesel.

Factory-style hangers in stock locations are included with this Flowmaster cat-back, supporting installation around the stated mounting points on compatible trucks. Its 3.5-inch mandrel-bent stainless tubing and straight-through Flow FX muffler specify the exhaust path, while the listing names 2017–2024 Ford F-250 and F-350 6.2L/7.3L applications.

The system is listed for 2017–2024 Ford F-250 and F-350 Super Duty trucks with 6.2L or 7.3L V8 engines, giving buyers a defined application range to check. Factory-style hangers in stock locations and included hardware support installation using the specified mounting locations. Its 3.5-inch mandrel-bent 16-gauge 409 stainless tubing is described as maximizing flow and durability, while the straight-through Flow FX muffler delivers a deep, moderate performance tone.

Skip it if you drive a truck outside the listed F-250 or F-350 years and 6.2L/7.3L V8 applications; this system's fitment is specific.

This fits buyers seeking a cat-back system for the listed 2017–2024 Ford F-250 or F-350 Super Duty 6.2L or 7.3L V8. Confirm that exact application boundary before choosing this single-side-exit setup.

Listed on Amazon as: Flowmaster 717943 FlowFX Cat-Back Exhaust Stainless 3.5 Inch Single Side Exit Compatible with 2017-2024 Ford F-250 /F-350 Super Duty 6.2L/7.3L V8. This product is not created or sold by Ford Fits