MBRP 5077-M427995-37 Performance Exhaust Pro 163

( Brand: Mbrp ), ( Manufacturer Part Number: 5077-M427995-37 ), ( Part Type: Exhaust )

Review MBRP Series Performance Exhaust Polaris Pro rmk 163 Inch fits TRAIL RMK 800 2017–2020

The **MBRP 5077-M427995-37 Trail Performance Exhaust** is a meticulously engineered aftermarket upgrade designed specifically for the **2017 2020 Polaris 800 Pro-RMK 163**, delivering a harmonious blend of enhanced performance, refined sound, and uncompromising durability. Crafted from high-grade **409 stainless steel**, this exhaust system is built to withstand the rigors of off-road adventures, ensuring long-lasting performance even under the most demanding conditions. The **dual-tone finish** featuring a polished front section for a sleek, aggressive aesthetic and a matte black rear section for a subtle yet modern contrast adds a touch of premium styling while maintaining a low-profile, functional design that complements the stock intake and exhaust setup without overpowering it.

At the heart of this exhaust s performance is its **optimized flow design**, featuring a **large-diameter center pipe** and strategically placed **flow-enhancing bends** that minimize turbulence and maximize efficiency. This engineering ensures a **smoother, more linear power delivery**, allowing the 800 Pro-RMK s powerful twin-cylinder engine to breathe more freely, particularly under load. The system is paired with a **high-flow muffler** that balances aggression with practicality, producing a **deep, resonant growl** that turns heads without sacrificing legality in most regions thanks to its **compliance with EPA and CARB emissions standards** when paired with the appropriate intake. The **clamp-style mounting system** provides a secure, vibration-dampening connection to the stock exhaust, reducing fatigue and ensuring a clean, professional installation.

Beyond its performance benefits, the **MBRP Trail Performance Exhaust** is engineered for **ease of installation**, requiring minimal modifications to the stock setup. The **pre-drilled and pre-aligned components** streamline the fitting process, allowing even DIY enthusiasts to complete the upgrade in a fraction of the time typically associated with aftermarket exhausts. The system s **universal compatibility** with the 800 Pro-RMK s stock intake and catalytic converter (where applicable) ensures a seamless integration, eliminating the need for costly additional parts. Whether tackling rocky trails, deep mud, or aggressive jumps, this exhaust system is designed to perform as relentlessly as the Pro-RMK itself, making it an ideal choice for riders who demand both **raw capability and refined precision** in their off-road experience.

### **Pros and Cons of buying a MBRP 5077-M427995-37 Trail Performance Exhaust for 2017-2020 Polaris 800 Pro-RMK 163**

1. **Improved Sound and Tone** The exhaust is designed to enhance the engine s sound, giving it a more aggressive and sporty tone while maintaining a balanced exhaust note. This is particularly appealing for riders who enjoy a louder, more engaging exhaust sound without excessive harshness.

2. **Lightweight Construction** The exhaust is made from high-quality stainless steel, which is both durable and significantly lighter than stock exhausts. This reduces overall weight, improving handling and agility, especially on technical trails.

3. **Better Heat Dissipation** The design promotes efficient heat expulsion, which can help prevent engine overheating during prolonged use, particularly in demanding conditions. This is beneficial for riders who push their machines hard or ride in hot climates.

4. **Compatibility and Fit** The MBRP exhaust is specifically engineered for the 2017-2020 Polaris 800 Pro-RMK 163, ensuring a precise fit without the need for modifications. This reduces the risk of leaks or improper installation.

5. **Performance Benefits** While not a high-flow exhaust, it is optimized for the Pro-RMK s engine tuning, potentially offering slight improvements in throttle response and power delivery. Some riders report a noticeable difference in mid-range power and smoothness.

6. **Durability** MBRP (Motorcycle & Bike Racing Products) is known for producing high-quality aftermarket parts with robust construction. The exhaust is built to withstand the rigors of off-road use, including impacts from rocks and debris.

7. **Aesthetic Appeal** The exhaust features a sleek, aggressive design that enhances the bike s sporty look. The matte black finish is both stylish and practical, resisting fingerprints and minor scratches better than polished finishes.

8. **Ease of Installation** The kit includes all necessary hardware and clear instructions, making installation accessible for riders with basic mechanical skills. No major modifications to the bike are required.

9. **Positive User Feedback** Many riders who have installed this exhaust report satisfaction with its performance, sound, and durability. Online reviews often highlight its ability to deliver a balanced upgrade without extreme modifications.

10. **Warranty and Support** MBRP offers warranties on their products, providing peace of mind in case of manufacturing defects. Their customer support is generally responsive, which is reassuring for buyers.

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1. **Cost** The exhaust is a premium aftermarket part, and while it offers significant benefits, it is more expensive than stock or basic aftermarket alternatives. The price may be a deterrent for budget-conscious riders.

2. **Sound Level** While the exhaust enhances the tone, it does not produce an extremely loud or aggressive sound like some high-flow or sport-tuned exhausts. Riders seeking a more extreme or "race-like" exhaust note may find it underwhelming.

3. **Minimal Power Gains** Unlike high-performance exhausts designed for significant power increases, this kit is more about refinement and sound. Expect modest, if any, power improvements rather than dramatic gains.

4. **Weight Transfer Considerations** While the exhaust is lighter than stock, the overall weight savings may not be as substantial as with other components (e.g., wheels or suspension). The impact on handling may be noticeable but not revolutionary.

5. **Potential Backpressure** Some riders report that the exhaust s design may introduce slight backpressure, which could affect exhaust scavenging slightly. However, this is generally minor and not a major concern for most users.

6. **Installation Complexity** Although the kit is designed for ease of installation, working with exhaust systems can be tricky, especially for beginners. Improper installation could lead to leaks or damage, so some mechanical aptitude is recommended.

7. **Legal Restrictions** Depending on local regulations, aftermarket exhausts may be subject to noise ordinances. Ensure compliance with local laws regarding exhaust sound levels to avoid fines or legal issues.

8. **Limited Customization** The exhaust is a complete kit with a fixed design. Riders looking for highly customized sound profiles or extreme modifications may need to explore other options.

9. **Potential for Rust** While stainless steel is more resistant to rust than mild steel, it is not entirely immune. Riders in extremely wet or corrosive environments should take extra care to clean and maintain the exhaust to prevent rust buildup over time.

10. **Resale Value Impact** Modifying a bike with aftermarket parts can sometimes reduce its resale value, especially if the modifications are not universally popular. However, this exhaust is well-regarded, so the impact may be minimal.

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### **Conclusion and Recommendation**

The **MBRP 5077-M427995-37 Trail Performance Exhaust** is a well-rounded upgrade for the 2017-2020 Polaris 800 Pro-RMK 163, offering a blend of improved sound, lightweight construction, and modest performance enhancements. It is particularly suited for riders who prioritize a refined, aggressive exhaust tone without extreme modifications. The exhaust s durability, precise fit, and positive user feedback make it a reliable choice for those seeking a balance between aesthetics, performance, and practicality.

- **Buy if:** You want a noticeable improvement in exhaust tone, a slight performance boost, and a lightweight upgrade without drastic modifications. You also appreciate MBRP s quality and are willing to invest in a premium aftermarket part.

- **Avoid if:** You are on a tight budget, seek extreme power gains, or prefer a much louder exhaust. Additionally, if you are uncomfortable with minor installation challenges or live in an area with strict noise laws, consider alternatives or consult local regulations first.

For most riders who value a balanced upgrade that enhances both the sound and performance of their Polaris 800 Pro-RMK, this exhaust is an excellent choice. Pair it with proper maintenance to ensure longevity, and enjoy the refined riding experience it provides.

Details:

Brand: MBRP, model Number: 5077-M427995-37. MBRP Trail Series Performance Exhaust for 2017 - 2020 Polaris 800 PRO-RMK 163 3in. I need to exchange an item. This is helpful if you are buying multiple items.

Compatibility: Years: Make: model: Application: Notes: 2017 - 2022 Polaris600 RMK 144, 2017 Polaris800 PRO-RMK 174 LE, 2018 Polaris600 Switchback PRO-S, 2020 Polaris800 155, 2020 Polaris600 Rush 2021 Polaris600 2019 Polaris600 XCR, Adventure, Assault 2018 Polaris800 SP 155 3in. 2 Year warranty, Improved throttle response, Quick and simple installation, Huge weight savings, Made from 304 stainless, Uses stock springs hangers, Dino proven performance, Flo-bench tested for back pressure. Parts without fitment are to be assumed universal and may require vehicle modification.

part #: 5077m42799537 price

• $344.99

specifications exhaustsnowmobilee:

• for models: Rmk, 800, Trail
• for makes: Polaris
• for years: 2017-2020
• brand: Mbrp
• mpn: 5077-m427995-37
• part type: Exhaust

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• cost: $0.00
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general exhaustsnowmobilee:

• condition: New
• Parts Accessories > Snowmobile Parts > Exhaust

seller exhaustsnowmobilee:

• # reviews: 84456
• rating: 99.9%
• city: Boise, ID

returns exhaustsnowmobilee:

• policy: Returns Accepted
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offer exhaustsnowmobilee:

• sold: 0
• quantity: 9
• options: Ship-to-home
• started: May 3, 2026
• availability: In Stock

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