HARLEY-DAVIDSON 48538 Exhaust Muffler

( Brand: Harley-davidson ), ( Manufacturer Part Number: 48538 ), ( Mounting Style: Bolt-on, Clamp-on, Slip-on ), ( Shape: Round Straight ), ( Machine Type: Street Motorcycle ), ( Color: Silver ), ( Outlet Diameter: 4 In ), ( Material: Stainless Steel ), ( Muffler Type: Combination ), ( Vintage Part: No ), ( Placement On Vehicle: Rear, Right, Exhaust ), ( Type: Muffler ), ( Unit Type: Unit ), ( Oe/oem Part Number: 64900720 ), ( Manufacturer Warranty: 1 Month ), ( Inlet Diameter: 1.75 ), ( Features: Easy To Replace ), ( Finish: Matte ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON Oem Hd Genuine Exhaust System Mufflers Bronze fits SOFTAIL FAT BOB M8 1926–2018

The **Harley-Davidson 48538 18-26 M8 Softail Fat Bob Exhaust Mufflers** are a meticulously engineered pair of performance mufflers designed exclusively for the iconic **Fat Bob** and **Softail** models spanning the **2018 through 2026** generations. Crafted from high-quality **304 stainless steel**, these mufflers are built to withstand the rigorous demands of Harley-Davidson s powerful V-twin engines while delivering an unmistakable blend of **smooth, aggressive tone and enhanced exhaust flow**. The **M8 series** features a **dual-chamber design** with a **center baffle and precision-machined internal components**, ensuring optimal backpressure regulation to optimize power delivery while maintaining a deep, resonant growl that turns heads on the road. The **sleek, low-profile construction** complements the Fat Bob s signature aggressive stance, with a **matte black finish** that not only enhances the bike s aesthetic appeal but also resists corrosion and wear over time. These mufflers are engineered to **reduce noise levels while preserving the raw, unfiltered character** of the Harley sound, making them an ideal choice for riders who seek both **performance and compliance** with modern emissions standards. Whether cruising down a scenic highway or navigating tight city streets, the **48538 M8 mufflers** ensure a **refined yet commanding exhaust note** that reinforces the Fat Bob s reputation as a **legendary muscle bike**. Built to Harley-Davidson s exacting standards, these mufflers are a **direct bolt-on replacement**, requiring no modifications to the existing exhaust system, and are backed by the brand s reputation for **durability and reliability**. For riders who demand **both power and presence**, the **M8 Softail Fat Bob mufflers** deliver a perfect fusion of **engineering precision and Harley-Davidson heritage**.

Buying the Harley-Davidson 48538 18-26 M8 Softail Fat Bob exhaust mufflers (part of the M8 series) can enhance the performance and aesthetics of your bike, but it comes with several considerations.

1. **Improved Sound:** The M8 mufflers are designed to produce a deeper, more aggressive tone compared to stock exhausts. This can significantly enhance the bike s exhaust note, making it more distinctive and satisfying to ride.

2. **Performance Gains:** These mufflers are often slightly larger in diameter and optimized for better airflow, which can improve throttle response and engine efficiency. This may result in a slight increase in horsepower and torque, especially noticeable in low to mid-range RPMs.

3. **Aesthetic Appeal:** The M8 mufflers feature a sleek, aggressive design that complements the Fat Bob s muscular look. The matte black finish with chrome accents adds a modern touch, making the bike stand out.

4. **Durability:** Harley-Davidson parts are generally built to last, and the M8 mufflers are no exception. They are constructed with high-quality materials to withstand the demands of daily riding and long-distance trips.

5. **Compatibility:** These mufflers are specifically designed for the 18-26 Softail Fat Bob models, ensuring a perfect fit without the need for modifications. This reduces the risk of installation issues.

6. **Aftermarket Support:** The M8 series is a popular choice among Harley riders, so finding installation services, replacement parts, or tuning adjustments is relatively straightforward.

7. **Resale Value:** Upgrading to aftermarket exhausts like the M8 can enhance the bike s appeal to potential buyers, potentially increasing its resale value if the market favors performance upgrades.

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1. **Cost:** The M8 mufflers are a premium aftermarket product, and the price point is significantly higher than stock exhausts. This can be a substantial investment, especially if you re on a tight budget.

2. **Noise Regulations:** While the M8 mufflers produce a more aggressive sound, some regions have strict noise laws. Riding with excessively loud exhausts could result in fines or legal trouble, particularly in urban areas or countries with strict emissions regulations.

3. **Installation Complexity:** While the mufflers are designed for easy installation, replacing exhaust components on a Harley-Davidson can be labor-intensive. If you re not mechanically inclined, you may need to pay for professional installation, adding to the overall cost.

4. **Potential Backfiring:** Some riders report that aftermarket exhausts, including the M8 series, can lead to increased backfiring, especially during deceleration. This can be annoying and may require additional tuning or modifications to mitigate.

5. **Weight:** Aftermarket exhausts are often heavier than stock systems, which can slightly reduce handling agility, particularly at high speeds or during aggressive maneuvers.

6. **Warranty Concerns:** Installing aftermarket parts may void your Harley-Davidson warranty, depending on the terms outlined by the manufacturer. This is something to consider if your bike is still under warranty.

7. **Maintenance:** Aftermarket exhausts may require more frequent maintenance, such as cleaning or replacing muffler seals, to ensure optimal performance and prevent leaks.

8. **Compatibility with Other Mods:** If you plan to install other performance mods (e.g., headers, camshafts, or fuel system upgrades), the M8 mufflers may need to be paired with additional components to avoid issues like detonation or poor fuel economy.

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The Harley-Davidson 48538 18-26 M8 Softail Fat Bob exhaust mufflers are an excellent choice for riders looking to enhance the sound, performance, and appearance of their bike. They offer noticeable improvements in exhaust tone and engine response while maintaining durability and compatibility. However, the higher cost, potential legal issues related to noise, and the need for careful installation and maintenance are significant drawbacks. If you prioritize a deeper exhaust note, better performance, and are willing to invest in a premium upgrade, these mufflers are a strong option. Conversely, if you re concerned about budget, noise regulations, or prefer to keep your bike stock, you may want to reconsider or opt for a more budget-friendly alternative.

If you re committed to upgrading your exhaust system and have checked local noise laws, the M8 mufflers are a solid investment that will pay off in terms of sound and performance. Ensure you have the mufflers professionally installed to avoid voiding your warranty and to guarantee a proper fit. Additionally, consider pairing them with other complementary mods (e.g., headers or a tune) if you re aiming for maximum performance gains. For riders who are unsure about the commitment, it may be worth testing a lower-cost aftermarket option first to see if you prefer the sound and performance before investing in the M8 series.

Details:

Genuine Harley Davidson. Original factory mufflers. Harley 18-26 Softail Fat Bob Factory Exhaust System With Mufflers Silver. Breakout Fat Boy.

This item is Real Genuine Parts, Not cheap C0pies. If you do not See it in the photos, Then is included. Most Of The Stuff I Sell Is Used And It All Can Not Be Perfect. Low rider, Low rider, ST Sport Glide.

Really Good Condition, Few minor marks, You can see them in the Pics. I will certainly be glad to help If can. Softail M8 model's 18-25. Heritage Classic, Street Bob, Softail Slim, Deluxe Standard.

PICS SPEAK FOR their self's. This comes as you see it in pics.

part #: 48538 price

• $59.95

specifications cyclemufflermo:

• for models: M8, Softail, Fat, Bob
• for makes: Harley
• for years: 1926-2018
• brand: Harley-davidson
• mpn: 48538
• mounting style: Bolt-on, Clamp-on, Slip-on
• shape: Round Straight
• machine type: Street Motorcycle
• color: Silver
• outlet diameter: 4 In
• material: Stainless Steel
• muffler type: Combination
• vintage part: No
• placement on vehicle: Rear, Right, Exhaust
• type: Muffler
• unit type: Unit
• oe/oem part number: 64900720
• manufacturer warranty: 1 Month
• inlet diameter: 1.75
• features: Easy To Replace
• finish: Matte
• country of origin: United States

offer cyclemufflermo:

• options: Ship-to-home
• availability: In Stock
• sold: 0
• quantity: 1
• started: May 7, 2026

shipping cyclemufflermo:

• service: FedEx Ground / FedEx Home Delivery
• type: Fixed
• transit: 5-8 Days
• class: Standard
• carrier: FedEx
• cost: $19.95

returns cyclemufflermo:

• time: 30 Days
• paid by: Buyer
• policy: Returns Accepted

payments cyclemufflermo:

• credit card: Diners-club
• other
• wallet: Google-pay

seller cyclemufflermo:

• # reviews: 36885
• rating: 99.7%
• city: North Wilkesboro, North Carolina

general cyclemufflermo:

• condition: Used
• Motorcycle Scooter Parts Accessories > Exhaust Emission Systems > Silencers, Mufflers Baffles

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