S-S CYCLE Diamondback Exhaust Muffler Heat 2-INTO-1 Reviews 550-0999S

( Brand: S-s Cycle ), ( Part Type: Heat Shield Exhaust Muffler ), ( Items Included: Muffler ), ( Manufacturer Part Number: 550-0999 ), ( Finish: Raw )

Review S CYCLE Scycle 5500999s Diamondback 2-into-1 Exhaust Muffler And Heat Shields Only

The Diamondback 2-into-1 Exhaust Muffler, model number 550-0999, from Cycle Parts, is a high-performance replacement exhaust component designed specifically for Harley-Davidson motorcycles. This muffler is engineered to deliver an exceptional balance of power and sound, making it an ideal choice for riders who want to enhance the performance and aesthetics of their Harley-Davidson.

This Diamondback muffler is a 2-into-1 design, meaning it combines the exhaust gases from two cylinders into a single exhaust pipe. This design not only reduces the overall length and weight of the exhaust system but also improves the flow of exhaust gases. The result is increased horsepower and torque, translating to improved acceleration and overall riding performance.

The 550-0999 muffler is made from premium-quality materials, with a diamond-black powder-coated finish that provides both a sleek appearance and superior protection against the elements. The muffler's inner core is constructed from high-flow stainless steel, which allows for increased exhaust flow and better scavenging of spent gases.

One of the standout features of this Diamondback muffler is its unique 2-into-1 design with a removable baffle. This design allows riders to customize the sound of their exhaust by removing the baffle for a louder, more aggressive tone or keeping it in place for a more subtle, refined sound.

Another advantage of the Diamondback 550-0999 muffler is its Heat Shield Kit, which is included in the package. This heat shield kit helps protect the rider's legs from the intense heat generated by the exhaust system, ensuring a more comfortable riding experience.

In summary, the Diamondback 2-into-1 Exhaust Muffler, model 550-0999, is a top-tier replacement exhaust component designed to deliver improved performance, customizable sound, and enhanced aesthetics for Harley-Davidson motorcycles. Its high-quality construction, advanced design features, and included Heat Shield Kit make it an excellent choice for riders seeking to optimize the exhaust system on their Harley-Davidson.

Pros and Cons of Buying Diamondback 2-into-1 Exhaust Muffler (550-0999) for Harley-Davidson Motorcycles

The Diamondback 2-into-1 Exhaust Muffler (550-0999) is a popular aftermarket exhaust option for Harley-Davidson motorcycles. Like any other purchase, it comes with its advantages and disadvantages. In this analysis, we will discuss both to help you make an informed decision.

1. Enhanced Performance: Diamondback exhaust systems are designed to improve the overall performance of your Harley-Davidson motorcycle. This exhaust muffler, in particular, helps in increasing the horsepower and torque, making your bike more responsive.

2. Beautiful Sound: The 2-into-1 design produces a deep, rich, and unique exhaust note that is highly appreciated by Harley enthusiasts. This exhaust will add character to your bike's sound.

3. Durability: Diamondback exhausts are constructed using high-quality materials like stainless steel to ensure long-lasting durability. This exhaust muffler is designed to withstand various weather conditions and heavy usage.

4. Easy Installation: The exhaust muffler comes with all necessary hardware for installation. It is a bolt-on part, which makes the installation process hassle-free and straightforward.

5. Improved Fuel Economy: Some users have reported an improvement in fuel economy after installing this exhaust muffler. This could be due to the more efficient combustion process and less backpressure in the exhaust system.

1. Expensive: The Diamondback 2-into-1 Exhaust Muffler (550-0999) is pricier compared to some other aftermarket exhaust options. This might be a significant investment for some riders.

2. Loud: This exhaust muffler generates a louder exhaust note than the stock exhaust. If you prefer a quieter ride, this might not be the best choice for you.

3. May Not Be Street Legal: In certain jurisdictions, the louder exhaust note might not comply with local noise regulations. It is essential to check with your local authorities before installing this exhaust system.

4. Requires Professional Tuning (Optional): To achieve optimal performance, it is recommended to have your bike professionally tuned after installing this exhaust system. This adds an additional cost to the overall purchase.

The Diamondback 2-into-1 Exhaust Muffler (550-0999) is a high-quality aftermarket exhaust option that offers numerous benefits, such as enhanced performance, a unique exhaust note, durability, easy installation, and improved fuel economy. However, it also comes with some drawbacks, including its high price point, increased noise level, potential non-compliance with local noise regulations, and the need for professional tuning (optional).

If you are an avid Harley-Davidson enthusiast looking for a performance upgrade with a unique sound, this exhaust muffler might be worth the investment. However, if you prefer a quieter ride or are on a tight budget, it may not be the best choice for you.

If you are considering buying the Diamondback 2-into-1 Exhaust Muffler (550-0999) for your Harley-Davidson motorcycle, make sure to weigh the pros and cons carefully. Consider your personal preferences, budget, and local laws before making a decision. If you are unsure, consult with a professional to help you make the best choice for your specific situation.

Details:

The head pipe was cracked in several places, so this purchase does NOT include.diamondback muffler and heat shields. Muffler and Shields are in good condition. Muffler does have a scratch see pics, All welds appear to be in place with no damage for the mounting clamps.

This came off a 2023 Road Glide FLTRX.

part #: 5500999 prices

• $1638.70-$1896.65

specifications exhausterupt:

• brand: S-s Cycle
• part type: Heat Shield Exhaust Muffler
• items included: Muffler
• manufacturer part number: 550-0999
• finish: Raw

returns exhausterupt:

• policy: No Returns

offer exhausterupt:

• availability: In Stock
• started: December 20, 2025
• quantity: 1
• sold: 0
• options: Ship-to-home
• best offers: True

seller exhausterupt:

• # reviews: 206
• city: Morgan Hill, California
• rating: 100.0%

shipping exhausterupt:

• type: Fixed
• service: Flat Rate Freight
• class: Freight
• cost: $29.95

payments exhausterupt:

• credit card: Diners-club
• other
• wallet: Paypal
• money order

general exhausterupt:

• Motorcycle Scooter Parts Accessories > Exhaust Emission Systems > Exhaust System Kits
• condition: Used

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