BMW 18519829769 Exhaust Manifold Header

( Manufacturer Part Number: 18519829769 ), ( Mounting Style: Bolt-on ), ( Type: Exhaust Manifold ), ( Oe/oem Part Number: 18518559520 ), ( Color: Chrome ), ( Placement On Vehicle: Exhaust )

Review BMW Exhaust Manifold Header fits R1250GS R1250R R1250RT R1250RS

The **BMW R1250GS, R1250R, R1250RT, and R1250RS Exhaust Manifold Header (Part Number: 18519829769)** is a high-performance, precision-engineered component designed to enhance the breathing and efficiency of BMW s iconic air-cooled and liquid-cooled parallel-twin engines across its flagship adventure, naked, touring, and sport-touring models. Crafted from high-grade, heat-resistant stainless steel, this manifold header is built to withstand the extreme thermal and mechanical stresses of high-revving operation while maintaining structural integrity and durability. The design features a carefully optimized flow path, ensuring minimal turbulence and maximum exhaust gas evacuation, which translates to improved throttle response, smoother power delivery, and a more aggressive, sporty exhaust note. Whether you re chasing the raw, growling character of the R1250GS or the refined yet spirited tone of the R1250R, this header is engineered to complement the distinct voice of each model while supporting a more dynamic riding experience. Its universal fitment across the R1250 series from the rugged off-road prowess of the GS to the sleek, upright ergonomics of the RT makes it a versatile upgrade for enthusiasts looking to refine their bike s performance without compromising reliability. Ideal for both stock and modified setups, this header pairs seamlessly with aftermarket exhaust systems, allowing for further tuning potential, whether you re targeting a deeper, more resonant exhaust tone or a sharper, more aggressive sound profile. Built to BMW s exacting standards, it ensures a perfect match with the factory exhaust system, eliminating the need for additional gaskets or adapters, while its robust construction guarantees longevity even under demanding conditions. For riders who demand precision, performance, and a touch of BMW s signature engineering excellence, this exhaust manifold header is an essential component for unlocking the full potential of the R1250 lineup.

### **Pros and Cons of Buying a BMW R1250GS, R1250R, R1250RT, or R1250RS with an Aftermarket Exhaust Manifold/Header**

#### **Overview of the BMW R1250 Series**

The BMW R1250GS, R1250R, R1250RT, and R1250RS are high-performance motorcycles known for their twin-cylinder engines, advanced electronics, and premium build quality. The R1250GS is an adventure bike, the R1250R is a naked cruiser, the R1250RT is a touring bike, and the R1250RS is a sport-touring model. All share the same engine architecture but differ in ergonomics and purpose.

An **aftermarket exhaust manifold/header** is a common modification aimed at improving exhaust flow, reducing backpressure, and enhancing engine performance. Below are the key considerations for purchasing one.

---

### **Pros of Installing an Aftermarket Exhaust Manifold/Header**

1. **Improved Exhaust Flow and Scavenging**

- Stock manifolds on BMW s R1250 models are often criticized for restrictive exhaust ports, which can limit engine efficiency, especially at higher RPMs.

- Aftermarket headers (e.g., from **BMW Performance Parts, Akrapovic, or Raceway**) feature larger-diameter ports and optimized angles, improving scavenging (the process of clearing spent combustion gases) and allowing fresh air to enter more efficiently.

- This can lead to better throttle response and smoother power delivery, particularly in the mid-to-high RPM range.

2. **Enhanced Engine Performance**

- With reduced backpressure, the engine can breathe better, potentially increasing horsepower and torque, especially in naturally aspirated configurations.

- Some riders report noticeable gains in acceleration and top-end speed, though gains vary depending on the header quality and tuning.

- Paired with a **catalytic converter delete (CAT-BACK)** or **slip-on exhaust**, the performance benefits are amplified.

3. **Better Engine Cooling**

- Stock manifolds can trap heat, leading to premature engine wear or reduced efficiency.

- Aftermarket headers often have improved heat dissipation, helping maintain optimal engine temperatures.

4. **Compatibility with Tuning**

- If you plan to tune your bike (e.g., with **BMW Tuning, Powermax, or Raceway**), an aftermarket header is often a prerequisite for optimal results.

- Some tuners require specific headers to safely handle increased power outputs without damaging the engine.

5. **Aesthetic Appeal**

- Many aftermarket headers feature aggressive, sporty designs that improve the bike s visual appeal.

- Brands like **Akrapovic, Raceway, or BMW Performance Parts** offer high-quality, stylish options that complement the bike s sporty or adventure-oriented look.

6. **Potential for Lower Emissions (In Some Cases)**

- While most aftermarket headers are designed for performance, some modern models (e.g., **BMW Performance Parts headers**) are engineered to work with emissions systems, allowing for legal street use in regions with strict regulations.

- However, **CAT-BACK systems** (which include headers mufflers) are often required for significant power gains and may not pass emissions in all areas.

7. **Durability and Build Quality**

- High-end aftermarket headers (e.g., **Akrapovic, Raceway, or BMW Performance Parts**) are made from **4130 chromoly steel**, which is stronger and more resistant to heat and stress than stock components.

- Properly installed headers can last the life of the bike with minimal maintenance.

---

### **Cons of Installing an Aftermarket Exhaust Manifold/Header**

1. **Cost**

- Quality aftermarket headers (e.g., **Akrapovic, Raceway, or BMW Performance Parts**) can range from **$800 to $2,000 **, depending on the brand and whether they include mufflers.

- Installation may require professional labor, adding another **$200 $500** to the cost.

- If paired with a **CAT-BACK system**, the total expense can exceed **$3,000**.

2. **Potential for Emissions Non-Compliance**

- Many aftermarket headers (especially those paired with slip-ons or CAT-BACK systems) will **fail emissions tests** in regions with strict regulations (e.g., California, some European countries).

- If you plan to keep the bike street-legal, you may need to **retain the stock catalytic converter** or use a **legal slip-on** (which limits performance gains).

3. **Noise Levels**

- Aftermarket headers significantly increase exhaust noise, often exceeding **100 dB** (legal limit in many areas is **90 95 dB**).

- This can lead to **noise complaints from authorities** or require additional soundproofing (e.g., **insulated mufflers**).

- Some riders find the noise level overwhelming, especially on long rides.

4. **Potential for Engine Damage (If Mismanaged)**

- While headers themselves are safe, **improper tuning or mismatched components** (e.g., using a header with a stock ECU) can lead to **detonation, valve float, or engine damage**.

- Always ensure the header is paired with a **properly tuned ECU** (e.g., **BMW Tuning, Powermax, or Raceway**) to avoid issues.

5. **Installation Complexity**

- Installing a header requires **removing the stock exhaust, modifying the frame rail (if necessary), and ensuring proper gasket sealing**.

- Some riders may need professional help, adding to costs.

- **Welding or MIGing** may be required for a clean installation, which can be a DIY challenge for beginners.

6. **Potential for Reduced Reliability (If Low-Quality Parts Are Used)**

- Cheap aftermarket headers (e.g., **no-name brands**) may corrode or fail prematurely due to poor materials.

- Always purchase from **reputable brands** (Akrapovic, Raceway, BMW Performance Parts) to avoid quality issues.

7. **Maintenance Considerations**

- Aftermarket headers may require **more frequent inspections** for leaks or heat damage, especially in high-performance setups.

- If paired with a **CAT-BACK system**, mufflers may need replacement every **50,000 100,000 miles** due to wear.

8. **Resale Value Impact**

- A heavily modified bike with an aftermarket header (especially a **CAT-BACK system**) may have **lower resale value** than a stock or lightly modified BMW.

- Buyers often prefer bikes that remain **street-legal and emissions-compliant**.

---

### **Key Considerations Before Purchasing**

1. **Intended Use**

- **Street/Commuting:** If you ride mostly on the street, consider a **legal slip-on or header** (e.g., **BMW Performance Parts**) to avoid emissions issues.

- **Track/Performance:** If you plan to race or push the bike hard, a **full CAT-BACK system** (e.g., **Akrapovic, Raceway**) is ideal.

- **Touring/Adventure:** The R1250GS and R1250RT may benefit from a **quieter header** (e.g., **BMW Performance Parts**) to avoid noise complaints on long rides.

2. **Tuning Compatibility**

- If you plan to tune, ensure the header is **compatible with your chosen tuning solution** (e.g., **BMW Tuning, Powermax, or Raceway**).

- Some headers require **ECU flashing** to prevent engine damage.

3. **Legal Restrictions**

- Check local **emissions laws** before purchasing a header. Some states/countries **ban CAT-BACK systems** unless they are **DOT/EPA-approved**.

- If in doubt, consult a **local motorcycle mechanic** familiar with emissions regulations.

4. **Brand and Quality**

- **Akrapovic** Premium performance, aggressive sound, high cost.

- **Raceway** Reliable, good performance gains, mid-range pricing.

- **BMW Performance Parts** Legal-friendly, good for street use, slightly less aggressive.

- Avoid **no-name brands** unless you re certain of their quality.

5. **Installation Expertise**

- If you re not experienced with exhaust modifications, **hire a professional** to ensure a **proper weld and seal**.

- Poor installation can lead to **exhaust leaks, frame damage, or engine issues**.

6. **Budget**

- Factor in **header cost, installation, tuning, and potential emissions compliance upgrades**.

- A **full CAT-BACK system** can easily cost **$3,000 $5,000**, while a **legal slip-on** may be **$500 $1,500**.

---

### **Conclusion and Recommendation**

#### **Should You Buy an Aftermarket Exhaust Manifold/Header?**

- You **prioritize performance** and are willing to invest in a **high-quality header** (Akrapovic, Raceway).

- You **plan to tune the bike** and want optimal power delivery.

- You **don t mind increased noise** and are prepared for

Details:

Otherwise, it is in very good overall condition, and looks nice from most angles. See photos for details. The catalytic converter and the exhaust flap are intact in good working order.This header has a small ding on cross tube, dent left down tube. The 1250s have 3 bolts at the heads.

This will not fit the R1200 series, as those attach with only 2 bolts at heads. This is an OEM BMW exhaust header for R1250GS, R1250RT, R1250R, and R1250RT model's. This header was removed from a machine with very low mileage.

part #: 18519829769 prices

• $119.99-$312.64

specifications cyclemufflermo:

• for models: R1250gs, R1250r, R1250rt, R1250rs
• for makes: Bmw
• mpn: 18519829769
• mounting style: Bolt-on
• type: Exhaust Manifold
• oe/oem part number: 18518559520
• color: Chrome
• placement on vehicle: Exhaust

general cyclemufflermo:

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

returns cyclemufflermo:

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

seller cyclemufflermo:

• city: Scarborough, Maine
• # reviews: 510
• rating: 100.0%

payments cyclemufflermo:

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

shipping cyclemufflermo:

• transit: 4-8 Days
• cost: $49.47
• carrier: FedEx
• class: Standard
• service: FedEx Ground / FedEx Home Delivery
• type: Calculated

offer cyclemufflermo:

• availability: In Stock
• options: Ship-to-home
• started: February 5, 2026
• sold: 0
• quantity: 1
• best offers: True

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