MBRP 6638-M377117-68 Performance Exhaust Cat

( Brand: Mbrp ), ( Manufacturer Part Number: 6638-M377117-68 ), ( Part Type: Exhaust )

Review MBRP Series Performance Exhaust Arctic Cat fits TRAIL MOUNTAIN 800 2001–2002

The **MBRP 6638-M377117-68 Trail Performance Exhaust System** is a meticulously engineered aftermarket upgrade designed to enhance the performance, sound, and overall driving experience of the **2001-2002 Arctic Cat Mountain 800** off-road motorcycle. Crafted from high-quality **409 stainless steel**, this exhaust system is built to withstand the rigorous demands of trail riding, delivering superior durability while maintaining a sleek, aggressive aesthetic. The system features a **dual-tone, polished finish** with a matte black tip, blending modern style with rugged functionality to create a striking visual presence that turns heads on any trail. Engineered with precision, the exhaust incorporates a **flow-optimized design** that reduces backpressure, allowing the Mountain 800 s engine to breathe more efficiently and unlock additional power, torque, and responsiveness especially noticeable during acceleration and under load. The **full-length, high-flow construction** ensures a deeper, more engaging exhaust note, delivering a throaty, aggressive growl that resonates with the spirit of off-roading while adhering to EPA-compliant noise regulations.

Beyond performance, the MBRP exhaust system prioritizes **ease of installation**, thanks to its **direct-fit design** that requires minimal modification to the stock setup. The system includes **pre-drilled mounting points** and **O-ring-sealed flanges**, ensuring a secure and leak-proof connection to the bike s existing exhaust ports. The **heat-shielded construction** also protects surrounding components from excessive heat buildup, reducing the risk of damage to the bike s frame, suspension, or other critical parts. Whether tackling technical trails, carving through rough terrain, or simply cruising for fun, this exhaust system transforms the Mountain 800 into a more dynamic and exhilarating ride. Built to last, the MBRP 6638-M377117-68 is not just an upgrade it s a statement of performance, craftsmanship, and the uncompromising spirit of off-road adventure.

### **Pros and Cons of buying a MBRP 6638-M377117-68 Trail Performance Exhaust for a 2001-2002 Arctic Cat Mountain 800**

1. **Improved Sound and Tone** The Trail Performance exhaust is designed to enhance the engine s exhaust note, giving it a deeper, more aggressive sound while maintaining a balanced tone. This is often preferred by enthusiasts who enjoy a more engaging exhaust sound without excessive noise.

2. **Lightweight Construction** The exhaust is made with high-quality stainless steel, which is both durable and significantly lighter than OEM exhausts. This can help reduce overall weight, potentially improving handling and fuel efficiency slightly.

3. **Better Heat Dissipation** The design promotes efficient heat expulsion, which can help prevent engine overheating, especially during prolonged use or in high-performance applications.

4. **Compatibility with Aftermarket Upgrades** If you plan to add other performance modifications (such as a turbocharger, larger air filter, or performance camshaft), this exhaust is a solid foundation for future upgrades.

5. **Durability** MBRP (Mountain Bike Racing Products) is known for producing high-quality, long-lasting exhaust systems. The Trail Performance line is built to withstand rugged use, making it a reliable choice for off-road applications.

6. **Aesthetic Appeal** The exhaust has a sleek, modern look that enhances the appearance of the Mountain 800, which may be appealing if you value the visual aspect of your build.

7. **Reduced Backpressure** Compared to stock exhausts, this system often reduces backpressure, allowing the engine to breathe more freely, which can contribute to slightly improved throttle response and power delivery.

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1. **Noise Level** While the sound is improved, it is still louder than stock. If you operate in areas with strict noise regulations or near residential zones, this could lead to potential fines or complaints from neighbors.

2. **Potential Power Loss Without Tuning** Some aftermarket exhausts, especially those designed for performance, may not provide a noticeable power gain without a corresponding tune or ECU adjustment. If you re not planning to modify the engine further, the power improvement may be minimal.

3. **Cost** The MBRP exhaust is more expensive than the OEM exhaust. While it offers significant improvements, the price may be a deterrent for budget-conscious buyers.

4. **Installation Complexity** Installing an aftermarket exhaust may require additional labor, especially if you re not experienced with mechanical work. You may need to purchase new gaskets, hangers, or mounting hardware, adding to the overall cost.

5. **Limited Warranty** Like most aftermarket parts, the warranty may not cover damage from misuse, improper installation, or accidents. Ensure you follow installation guidelines to maximize warranty coverage.

6. **Potential Fitment Issues** While designed for the 2001-2002 Mountain 800, minor fitment issues (such as clearance with other components) could arise. Always verify compatibility with your specific model and consult with a professional if unsure.

7. **Resale Value Impact** Aftermarket exhausts may reduce the resale value of your Arctic Cat, as some buyers prefer stock or OEM components for simplicity and reliability.

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The MBRP 6638-M377117-68 Trail Performance exhaust is an excellent choice for owners of the 2001-2002 Arctic Cat Mountain 800 who prioritize improved exhaust tone, durability, and lightweight construction. It offers noticeable benefits in sound, heat management, and potential power delivery, especially when paired with other performance modifications. However, the increased noise level, cost, and potential installation challenges must be carefully considered.

If you enjoy a more engaging exhaust sound, plan to modify your engine further, or simply want a high-quality upgrade, this exhaust is a strong recommendation. If you re on a tight budget, prefer stock sound levels, or operate in noise-restricted areas, you may want to reconsider or opt for a less aggressive aftermarket option.

- You want a significant improvement in exhaust tone and sound quality.

- You plan to add other performance modifications (e.g., turbo, camshaft, or air intake).

- You value durability and lightweight construction.

- You re comfortable with the increased noise level and potential installation effort.

- Noise regulations in your area are strict.

- You re not planning to modify the engine further.

- You prefer to keep the vehicle closer to stock for simplicity or resale purposes.

- Budget constraints make the aftermarket exhaust unaffordable.

For the best results, pair this exhaust with a tune or ECU adjustment if you re pursuing performance gains. Always follow installation instructions carefully and consult with a professional if needed.

Details:

This is helpful if you are buying multiple items. Parts without fitment are to be assumed universal and may require vehicle modification. MBRP Trail Series Performance Exhaust for 2001 - 2002 Arctic Cat Mountain 800: 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 back pressure. Compatibility: Years: Make: model: Application: Notes: 2003 - 2003 Arctic Cat Mountain Cat 800 EFI 144, 2002 Arctic LE 151, Cater EFI, 2001 8 900 Early Build, Son Pro, 9 2001 Arctic LE, 1M, Build.

Brand: MBRP, model Number: 6638-M377117-68. I need to exchange an item.

part #: 6638m37711768 price

• $364.99

specifications exhaustsnowmobilee:

• for models: 800, Trail, Mountain
• for makes: Arctic, Arctic-cat
• for years: 2001-2002
• brand: Mbrp
• mpn: 6638-m377117-68
• part type: Exhaust

seller exhaustsnowmobilee:

• city: Boise, ID
• # reviews: 78575
• rating: 99.8%

offer exhaustsnowmobilee:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: February 26, 2026
• quantity: 7

returns exhaustsnowmobilee:

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

shipping exhaustsnowmobilee:

• transit: 2-5 Days
• class: Standard
• type: Fixed
• cost: $0.00
• service: Standard

payments exhaustsnowmobilee:

• credit card: Discover
• wallet: Apple-pay
• other

general exhaustsnowmobilee:

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

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