BMW 18121340548 Exhaust Muffler Pipe MK-729

( Manufacturer Part Number: 18121340548 ), ( Type: Muffler Assembly ), ( Placement On Vehicle: Exhaust )

Review BMW Exhaust Muffler Pipe Assembly fits R1100 1100 GS 1994–1999

The **BMW 18121340548 exhaust muffler pipe (MK-729)** is a precision-engineered component designed specifically for the **1994 1999 BMW R1100GS and R1100GS Adventure** models, ensuring optimal performance, durability, and compliance with the motorcycle s original design intent. This high-quality exhaust pipe is part of the **MK-729 series**, a trusted aftermarket solution that seamlessly integrates with the stock exhaust system while delivering enhanced flow characteristics and a refined exhaust note. Crafted from **high-grade stainless steel**, this muffler pipe is built to withstand the rigors of daily riding, including long-distance touring, off-road adventures, and high-speed highway cruising, without succumbing to corrosion or deformation. Its **smooth, contoured design** minimizes turbulence, allowing exhaust gases to exit efficiently while maintaining the motorcycle s signature **deep, resonant tone** a hallmark of the R1100GS s classic exhaust system.

The **18121340548** exhaust pipe is engineered to replace the original OEM component with minimal modifications, making installation straightforward for both experienced mechanics and DIY enthusiasts. Its **precision-machined flanges** ensure a secure and leak-proof connection to the catalytic converter and downstream muffler, while the **reinforced construction** prevents flexing under vibration, a common issue with lower-quality aftermarket parts. This component is particularly well-suited for riders seeking to **restore stock performance** after modifications or those who prefer the **authentic, unaltered sound** of the R1100GS without the added weight or complexity of full exhaust systems. Whether you re maintaining your bike s original character or upgrading for better efficiency, this exhaust pipe delivers **reliable performance, longevity, and a satisfying auditory experience** that complements the motorcycle s legendary engineering.

### **Pros and Cons of Buying a BMW R1100GS (1994-1999) Exhaust Muffler Pipe (MK-729, Part #18121340548)**

1. **OEM Quality and Fit** This is a genuine BMW part, meaning it is designed to match the original specifications of the R1100GS. It will fit perfectly without modifications, ensuring proper alignment and function.

2. **Reliability and Durability** BMW s aftermarket and OEM parts are generally built to last, especially when sourced from reputable dealers or authorized suppliers. A well-maintained exhaust system reduces the risk of leaks, rust, or premature failure.

3. **Sound and Performance** The stock exhaust system on the R1100GS is already well-balanced, providing a deep, resonant tone without excessive noise. Replacing a worn or damaged muffler pipe with an OEM part ensures the bike retains its intended exhaust note and flow characteristics.

4. **Safety and Compliance** Using an original or high-quality aftermarket part ensures the bike remains road-legal and safe. Aftermarket exhausts that are not properly certified can sometimes fail emissions or noise regulations, whereas this OEM part will not.

5. **Resale Value** Keeping the bike stock or with genuine parts can help maintain its value, especially if you plan to sell it in the future. Buyers often prefer bikes that have been well-maintained with original components.

6. **Ease of Installation** Since this is an OEM part, it should be straightforward to install, assuming you have basic mechanical skills or access to a mechanic. No custom fitting or adjustments are typically required.

7. **Prevents Further Damage** A failing exhaust component can lead to more extensive issues, such as a damaged catalytic converter (if equipped), exhaust leaks causing engine damage, or even a fire hazard if the system is compromised. Replacing it proactively avoids these risks.

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1. **Cost** OEM parts can be expensive, especially for older BMW models like the R1100GS. The price may be higher than aftermarket alternatives, which could offer similar or even better performance at a lower cost.

2. **Limited Customization** If you re looking to modify the exhaust for a louder, sportier sound or improved performance, an OEM muffler pipe won t provide those benefits. Aftermarket exhaust systems (e.g., Akrapovic, Brembo, or other high-flow options) are designed for tuning and may offer better results.

3. **Potential for Counterfeit Parts** Purchasing from untrusted sellers (e.g., eBay without verification, unlicensed dealers) risks receiving a fake or low-quality part. Always buy from authorized BMW dealers, reputable aftermarket suppliers, or trusted mechanics to avoid this.

4. **Age of the Part** While the part itself may be new, the bike is from the mid-1990s, which means other components (e.g., mounts, clamps, or surrounding exhaust sections) may be worn and require replacement or reinforcement during installation.

5. **Rust and Corrosion** Older bikes, especially those exposed to harsh weather, may have rusted exhaust sections. If the surrounding pipes are corroded, replacing just the muffler pipe may not be sufficient, and additional work could be needed.

6. **Limited Availability** OEM parts for older BMW models can sometimes be hard to find, especially if the dealer doesn t stock them. You may need to order it, which could delay your project.

7. **No Performance Gains** Unlike aftermarket exhausts, this OEM part will not improve horsepower or torque. If performance is a priority, you d need to pair it with other modifications (e.g., air filter, ECU tuning, or a full exhaust system).

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Buying the **BMW R1100GS (1994-1999) OEM exhaust muffler pipe (MK-729, part #18121340548)** is a solid choice if your primary goal is **replacing a worn or damaged component with a reliable, high-quality part that fits perfectly**. It ensures the bike remains safe, legal, and true to its original specifications. However, if you re looking to **customize the sound, improve performance, or save money**, an aftermarket exhaust system might be a better investment.

- **Prioritize reliability, fit, and stock integrity?** Go with the OEM part.

- **Want better sound, performance, or cost savings?** Consider a high-quality aftermarket alternative.

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1. **Verify the Part s Authenticity** Purchase from an **authorized BMW dealer, a trusted aftermarket supplier (e.g., BMW Motorrad Parts, Cycle World, or local BMW specialists), or a reputable online retailer with return policies**. Avoid unknown sellers to avoid counterfeit parts.

2. **Inspect the Surrounding Exhaust System** Before installing, check the **mounts, clamps, and adjacent pipes** for rust or damage. If other components are compromised, address them simultaneously to prevent future issues.

3. **Consider Aftermarket Options if Modifying** If you plan to tune the bike or change the exhaust note, research **aftermarket exhaust systems** (e.g., **Akrapovic, Brembo, or Kustom**) that are designed for the R1100GS. These can offer better sound and performance at a comparable price.

4. **Budget for Installation** While the part itself may be straightforward to install, if you re not experienced, factor in **labor costs** or the time required to do it yourself.

5. **Maintain the Exhaust System** Regularly check for **rust, leaks, or loose clamps**, especially if the bike is ridden in wet or salty conditions. A well-maintained exhaust system extends the life of the part and prevents engine damage from exhaust gas leaks.

6. **Document the Purchase** Keep receipts and proof of purchase in case you need to return the part or verify its authenticity later.

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For a **direct replacement with no compromises on fit or quality**, the OEM muffler pipe is an excellent choice. However, if you re open to modifications, explore aftermarket options that align with your goals. Always prioritize **safety, compatibility, and source reliability** when making the purchase.

Details:

Condition: in excellent condition, little to no rust, See photos for more details. USPS: 800-ASK-USPS. Shipping times and fees vary. UPS: 800-PICK-UPS.

This part came off of a 1999 BMW R1100 GS with 5,723 miles. FedEx: 1-800-GOFEDEX. Please remember the key word is USED.

part #: 18121340548 prices

• $49.99-$147.73

specifications cyclemufflermo:

• for models: R1100, 1100, Gs
• for makes: Bmw
• for years: 1994-1999
• mpn: 18121340548
• type: Muffler Assembly
• placement on vehicle: Exhaust

seller cyclemufflermo:

• rating: 99.6%
• city: Kenosha, Wisconsin
• # reviews: 49409

shipping cyclemufflermo:

• cost: $0.00
• class: Standard
• carrier: USPS
• type: Fixed
• transit: 5-10 Days
• service: USPS Ground Advantage

payments cyclemufflermo:

• other
• wallet: Google-pay
• credit card: Visa

returns cyclemufflermo:

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

general cyclemufflermo:

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

offer cyclemufflermo:

• started: May 22, 2026
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0

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