Upgrading your diesel truck’s muffler can improve exhaust flow, enhance sound, and even provide a slight performance boost. But with so many options, choosing the right one is tough. We researched manufacturer specs, industry standards, and aggregated owner feedback to bring you this comparison of the best mufflers for diesel engines. Our evaluation focuses on performance, durability, value, ease of installation, and safety. Whether you want a deep rumble or maximum flow, we have a pick for you.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
MagnaFlow 19469 Stainless Steel Muffler Best Overall 3.0 inch inlet/outlet, straight-through design, 409 stainless steel |
9.0 | 🛒 Check Price |
|
🚗
|
Flowmaster 17112 Outlaw Series Muffler Best Sound 3.0 inch inlet/outlet, chambered design, aluminized steel |
8.7 | 🛒 Check Price |
 |
Borla 40349 Pro XS Muffler Best Premium 3.0 inch inlet/outlet, straight-through, 304 stainless steel |
8.4 | 🛒 Check Price |
 |
Dynomax 17730 Super Turbo Muffler Best Value 3.0 inch inlet/outlet, chambered design, aluminized steel |
8.1 | 🛒 Check Price |
 |
MBRP S5030AL Muffler Best for Towing 3.5 inch inlet/outlet, straight-through, 409 stainless steel |
7.8 | 🛒 Check Price |
|
🚗
|
Walker 22571 SoundFX Muffler Best Quiet 2.5 inch inlet/outlet, chambered design, aluminized steel |
7.3 | 🛒 Check Price |
 |
Gibson 610830 Dual Sport Muffler Best Dual Outlet 3.0 inch inlet, dual 2.5 inch outlets, aluminized steel |
7.6 | 🛒 Check Price |
1. MagnaFlow 19469 Stainless Steel Muffler: Best Overall
The MagnaFlow 19469 is a top contender for diesel owners seeking a balance of performance and sound. In our evaluation based on spec sheets and owner feedback, this straight-through muffler consistently delivers reduced backpressure and a deep, aggressive tone that many diesel enthusiasts love. The 409 stainless steel construction ensures it withstands harsh conditions, and owners report it lasting years without rust. However, we found that the sound level may be too pronounced for those who prefer a quiet cabin, especially on long highway trips.
Who should skip it? If you tow heavy loads regularly and need a muffler that keeps cab noise to a minimum, this might not be your best choice. Some owners also note that the drone at certain RPMs can be bothersome. For a more subdued experience, consider a chambered design.
- Straight-through design reduces backpressure for improved exhaust flow
- Constructed from 409 stainless steel for long-lasting corrosion resistance
- Produces a deep, aggressive diesel tone without excessive drone
Pros: Excellent build quality and welds; Noticeable performance gains on turbo diesel engines
Cons: May be too loud for some daily drivers
2. Flowmaster 17112 Outlaw Series Muffler: Best Sound
The Flowmaster 17112 Outlaw Series is famous for its loud, aggressive sound. Based on owner feedback and our research, this muffler provides one of the deepest tones available for diesel engines. The chambered design helps control drone while still allowing a powerful exhaust note. It fits many popular diesel trucks directly, making installation straightforward. However, the aluminized steel construction is a compromise; while it resists corrosion well, it won’t outlast stainless steel options in areas with heavy road salt.
Who should skip it? If you need a muffler that will survive in the rust belt for a decade, look for a stainless model. Also, if you prefer a quieter ride or have neighbors sensitive to noise, this muffler might be too loud. Consider a turbo-back system with a resonator for a more civilized sound.
- Chambered design delivers a classic deep rumble with minimal restriction
- Aluminized steel construction offers good corrosion resistance
- Direct fit for many popular diesel trucks like Ford Power Stroke and Ram Cummins
Pros: Aggressive sound that turns heads; Smooth installation with included hardware
Cons: Aluminized steel may not last as long as stainless in salt-belt climates
3. Borla 40349 Pro XS Muffler: Best Premium
The Borla 40349 Pro XS is a premium choice for diesel owners who want the best materials and sound refinement. In our evaluation, the use of 304 stainless steel ensures it will outlast the vehicle itself, and Borla’s Aero-Tone technology delivers a deep exhaust note without the annoying drone that plagues many straight-through designs. Owner feedback highlights the excellent fit and finish, and the muffler is a direct replacement for many OEM units. However, the cost is significantly higher than comparable mufflers, which may deter budget-conscious buyers.
Who should skip it? If you are on a tight budget or don’t plan to keep your truck for many years, the premium investment may not be justified. Also, if you want the loudest possible sound, this muffler is more refined than extreme. For those who value longevity and a balanced tone, it’s a top pick.
- Premium 304 stainless steel construction for outstanding durability
- Aero-Tone technology reduces drone while maintaining a rich sound
- Designed for high-flow applications with minimal backpressure
Pros: Exceptional build quality and lifetime warranty; Excellent sound control with no drone
Cons: Premium price point may not fit all budgets
4. Dynomax 17730 Super Turbo Muffler: Best Value
The Dynomax 17730 Super Turbo is a budget-friendly muffler that offers a solid upgrade for diesel trucks. Based on owner reviews and our comparison, it provides a deeper tone than stock while keeping noise levels reasonable. The chambered design helps control drone, making it suitable for daily driving. The aluminized steel construction is adequate for most climates, but may show rust after a few years in areas with road salt. Installation is straightforward, and it’s a direct fit for many models.
Who should skip it? If you live in the rust belt or plan to keep your truck for many years, you may want to invest in a stainless steel muffler. Also, if you are chasing maximum performance gains, this muffler is not the most free-flowing. For a cost-effective upgrade, it’s a solid choice.
- Chambered design reduces noise while improving flow over stock
- Aluminized steel provides good corrosion resistance at a lower cost
- Compact design fits in tight spaces under many diesel trucks
Pros: Very affordable compared to stainless options; Noticeable improvement in exhaust tone without being overly loud
Cons: Not as durable as stainless steel in harsh environments
5. MBRP S5030AL Muffler: Best for Towing
The MBRP S5030AL is designed for diesel trucks that see heavy towing or high-performance use. Our research indicates that the large 3.5 inch diameter helps reduce backpressure, which can lower EGTs and improve turbo response. The 409 stainless steel offers good longevity, and the sound is deep but not intrusive at cruising speeds. However, the larger size may not fit all trucks without cutting or welding, and some owners report that the drone can be noticeable under load.
Who should skip it? If you have a stock or mildly modified truck and don’t tow heavy loads, this muffler may be overkill and could be too loud for daily driving. Also, if you prefer a simple bolt-on installation, check fitment carefully. For serious towers, it’s a strong performer.
- Large 3.5 inch diameter for maximum exhaust flow under load
- 409 stainless steel construction for durability and corrosion resistance
- Deep tone that is not overly loud during highway cruising
Pros: Excellent for towing and heavy throttle applications; Reduces exhaust gas temperature (EGT) according to owner reports
Cons: Larger size may require modifications for some trucks
6. Walker 22571 SoundFX Muffler: Best Quiet
The Walker 22571 SoundFX is the go-to choice for diesel owners who want a quiet exhaust. In our evaluation based on owner feedback, this muffler produces a sound level very close to stock, making it perfect for those who want to avoid attention or keep cabin noise low. The aluminized steel is adequate for most climates, but may not last as long as stainless. It’s a direct fit for many trucks with 2.5 inch exhaust systems, so installation is straightforward. However, the smaller diameter and chambered design mean it offers little to no performance improvement.
Who should skip it? If you are looking for any performance gain or a more aggressive sound, this muffler is not for you. Also, if you have a modified engine with higher exhaust flow, the 2.5 inch inlet may be restrictive. For a quiet, reliable replacement, it’s a good option.
- Chambered design for a quiet, stock-like sound
- Aluminized steel construction with embossed sound-dampening technology
- Direct fit for many diesel trucks with 2.5 inch exhaust systems
Pros: Very quiet, ideal for noise-sensitive areas; Affordable and easy to install
Cons: Minimal performance gain over stock; Smaller diameter may restrict high-flow applications
7. Gibson 610830 Dual Sport Muffler: Best Dual Outlet
The Gibson 610830 Dual Sport muffler offers a unique dual outlet design that gives diesel trucks a custom, aggressive look. Based on our research, the chambered core produces a deep tone without excessive drone, and the 3.0 inch inlet accommodates higher flow. However, the aluminized steel and painted finish are less durable than stainless steel; some owners report the paint peeling after a few years. Installation is more complex than a single-outlet muffler, often requiring custom piping.
Who should skip it? If you want a simple bolt-on upgrade or prefer a stainless steel finish, this may not be your best bet. Also, if you live in a humid or salty environment, the painted finish may deteriorate quickly. For those who want a distinctive look and are willing to do some fabrication, it’s a solid choice.
- Dual outlet design for a custom look and improved flow
- Chambered core for a deep tone with reduced drone
- Aluminized steel with a high-temperature black paint finish
Pros: Aggressive appearance with dual tips; Good sound quality for the price
Cons: Installation can be tricky due to dual outlets; Paint may peel over time, leading to rust
Frequently Asked Questions
What is the best muffler for a diesel truck sound?
For the best sound, we found that chambered mufflers like the Flowmaster 17112 Outlaw Series deliver a deep, aggressive rumble. Straight-through designs like the MagnaFlow 19469 also provide a loud, distinct tone. Your choice depends on whether you prefer a classic muscle car sound (chambered) or a modern, high-flow roar (straight-through).
Will a muffler improve my diesel truck's performance?
A performance muffler can reduce backpressure, allowing the engine to breathe easier. This can lead to slight gains in horsepower and torque, especially on turbo diesel engines. However, the increase is usually modest (5-15 hp) and may require a tune or other exhaust mods to maximize. We recommend pairing a muffler with a downpipe and exhaust system for best results.
Are stainless steel mufflers worth the extra cost?
Yes, if you live in areas with road salt or high humidity, stainless steel (especially 304 grade) offers superior corrosion resistance and a longer lifespan. Aluminized steel is more affordable but may rust after a few years. For long-term durability, we suggest investing in stainless.
Can I install a muffler myself?
Many mufflers are designed for direct fit and can be installed with basic hand tools. However, cutting and welding may be required if the muffler is not a perfect match for your truck’s exhaust. We recommend professional installation if you are not experienced with exhaust work.
Will a louder muffler cause issues with emissions?
Generally, replacing the muffler alone does not affect emissions, as it does not alter the catalytic converter or DPF. However, removing or modifying emissions equipment is illegal in many areas. Always check local laws before modifying your exhaust.
Our Verdict
After researching and comparing the top mufflers for diesel engines, our top pick is the MagnaFlow 19469 for its excellent balance of performance, durability, and sound. For those on a budget, the Dynomax 17730 offers great value. If you prioritize sound above all, the Flowmaster 17112 is the runner up.
