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  3. BMW 31-42-7-707-625

BMW 31-42-7-707-625 Tube Left

fits model: Slider. make: Bmw.

31-42-7-707-625 Bmw Slider Tube Left New Oem

( Manufacturer Part Number: 31-42-7-707-625 ), ( Type: Parts )

Review BMW Tube Left New Oem fits SLIDER

The **BMW 31-42-7-707-625 Slider Tube (Left)** is a meticulously engineered, high-performance component designed exclusively for BMW s iconic M3 and M4 models, particularly those equipped with the S55 or S58 twin-turbocharged inline-six engines. This precision-crafted slider tube is a critical part of the vehicle s exhaust system, serving as a vital link between the turbochargers and the catalytic converters, where it plays a dual role in both optimizing exhaust flow and managing backpressure. Crafted from high-grade, heat-resistant stainless steel likely 409 or 439 grade this tube is built to withstand the extreme temperatures and pressures generated by aggressive driving styles, ensuring durability and reliability even under the most demanding conditions. The slider tube s unique design incorporates a telescoping mechanism, allowing it to adjust its length dynamically as the vehicle s suspension moves, thereby maintaining optimal exhaust gas evacuation and reducing turbulence. This adaptability not only enhances engine performance by minimizing backpressure fluctuations but also contributes to a smoother, more responsive throttle response, particularly during aggressive acceleration or high-speed cruising. The left-side slider tube is specifically tailored to fit the left exhaust manifold outlet, ensuring a seamless integration with the factory exhaust system while accommodating aftermarket upgrades such as larger turbochargers or high-flow catalytic converters. Its robust construction and precision machining also help mitigate the risk of exhaust gas leaks, which can compromise both performance and emissions compliance. Whether installed as part of a full exhaust system upgrade or as a standalone performance enhancement, this slider tube exemplifies BMW s commitment to engineering excellence, delivering both aesthetic refinement and tangible performance gains for enthusiasts seeking to push their M3 or M4 to its limits.

### **Pros and Cons of Buying a BMW 3 Series (E46) 425i/428i/730i/745i/625i (Slider Tube Left)**

The BMW E46 (1998 2006) is a highly sought-after model known for its driving dynamics, timeless design, and aftermarket potential. Below is a detailed breakdown of its advantages and disadvantages, followed by a conclusion and recommendation.

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### **Pros**

1. **Driving Dynamics and Handling**

- The E46 is renowned for its precise steering, balanced chassis, and engaging driving experience. The 4-cylinder (425i/428i) and 6-cylinder (730i/745i) models offer strong performance, with the 625i (M54-based) delivering serious power for its era.

- The slider tube left (STL) suspension setup improves ride comfort while maintaining sharp handling, making it a favorite among enthusiasts who want a blend of comfort and sportiness.

2. **Aftermarket Support and Customization**

- The E46 has one of the most extensive aftermarket communities, with widespread availability of parts, upgrades, and modifications. Owners can easily enhance performance (e.g., turbo kits, exhaust systems) or aesthetics (e.g., body kits, interior upgrades).

- Common modifications include engine swaps (e.g., S50/S54/S55), suspension tuning, and performance brake upgrades.

3. **Timeless Design and Resale Value**

- The E46 s design remains iconic, appealing to both classic car enthusiasts and modern buyers. Well-maintained examples hold their value well, especially in lower-mileage or restored conditions.

- The 625i (with its M54 engine) and 745i (with the S54) are particularly desirable due to their power and tuning potential.

4. **Reliability (With Proper Maintenance)**

- When maintained correctly, the E46 can be a durable car. The M54 (625i/745i) and S54 (M3) engines are robust and can handle high-performance modifications. The 4-cylinder engines (M44/M47) are simpler but may require more frequent maintenance.

- Common issues (e.g., water pump failures, suspension wear) are manageable with regular upkeep.

5. **Versatility**

- The E46 is available in multiple body styles (3-door, 4-door, coupe, convertible, wagon), catering to different preferences. The wagon (Touring) is especially practical for daily use.

- The 625i (with its 3.0L inline-6) and 745i (with its 3.0L twin-turbo) offer a good balance of power and efficiency for their time.

6. **Enthusiast Community and Events**

- The E46 has a strong following, with numerous clubs, meets, and events dedicated to the model. This makes it easier to find parts, advice, and like-minded owners.

---

### **Cons**

1. **Maintenance Costs and Complexity**

- The E46 requires regular maintenance to avoid costly repairs. Key areas include:

- **Engine:** The M54 and S54 engines are strong but benefit from oil changes every 5,000 7,500 miles (or as recommended by BMW) to prevent sludge buildup. Water pump failures are common on the M54, often requiring replacement around 80,000 100,000 miles.

- **Suspension:** The slider tube left setup is great but can wear out over time, requiring shocks, bushings, and control arms to be replaced periodically.

- **Transmission:** The Getrag ZF 6-speed (in 625i/745i) is reliable but can be finicky with clutch replacements if modified for performance.

- Labor costs can be high, especially for specialized BMW mechanics.

2. **Fuel Economy**

- The E46 is not known for its efficiency. The 425i/428i averages around 18 22 MPG, while the 625i/745i hovers around 16 20 MPG. Higher-performance models (e.g., M3) are even less efficient.

- Modern fuel prices make daily driving costly, especially for long commutes.

3. **Aging Technology and Comfort**

- The interior is functional but dated by today s standards. Features like manual climate control, basic infotainment, and poor sound insulation can be frustrating.

- The seats, while supportive, may not offer the same level of comfort as modern vehicles, especially on long drives.

4. **Common Issues**

- **Water Pump:** As mentioned, the M54 s water pump is a known weak point. Replacement is expensive ( $500 $800) and often requires removing the engine.

- **Suspension:** The slider tube left setup can develop leaks or wear out, leading to clunky handling. Struts and bushings may need replacement every 80,000 120,000 miles.

- **Electrical Gremlins:** The E46 is notorious for electrical issues, such as faulty sensors, wiring harness problems, or intermittent failures (e.g., ABS, traction control).

- **Rust:** Older E46s may suffer from rust in the wheel wells, sills, or floor pans, especially in snowy or salted regions. Inspect thoroughly before purchasing.

5. **Insurance and Registration Costs**

- The E46 is classified as a "classic" or "performance" vehicle in many regions, leading to higher insurance premiums. Some insurers may also charge more for modified or high-value examples.

- Registration fees for classic cars can be prohibitive in some areas, making ownership less practical for daily use.

6. **Limited Modern Safety Features**

- The E46 lacks modern safety features like advanced airbag systems, stability control (though later models have it), or collision avoidance tech. While the car handles well, it may not meet today s safety standards for family use.

7. **Parts Availability and Lead Times**

- While the aftermarket is strong, some OEM parts (especially for older models) can be difficult to source quickly. Prices for rare or discontinued items may also be inflated.

---

### **Conclusion**

The BMW E46 is a fantastic choice for enthusiasts who prioritize driving dynamics, aftermarket potential, and a timeless design. It thrives as a project car, a track or track-day vehicle, or a daily driver for those willing to invest time and money in maintenance. However, it is not ideal for buyers seeking a hassle-free, modern, or family-oriented vehicle.

The **625i (M54 engine)** and **745i (S54 engine)** are the best options for performance and longevity, offering a balance of power, reliability, and tuning potential. The **425i/428i** is more budget-friendly but lacks the punch and aftermarket support of the 6-cylinder models. The **M3 (E46)** is the pinnacle of the lineup but comes with higher maintenance costs and insurance premiums.

If you re buying an E46, prioritize:

- **Low mileage (under 100,000 miles)**.

- **Full service history**, especially for water pump, suspension, and engine maintenance.

- **No signs of rust or major structural damage**.

- **A budget for potential repairs** (expect to spend $3,000 $10,000 annually depending on modifications and condition).

---

### **Recommendation**

**Buy an E46 if:**

- You are an enthusiast who enjoys driving, modifying, and maintaining a classic BMW.

- You have experience with mechanical work or are willing to learn.

- You prioritize fun over practicality and are okay with higher running costs.

- You find a well-documented example (preferably a 625i or 745i) with a clean title and no major issues.

**Avoid an E46 if:**

- You need a reliable, low-maintenance daily driver.

- You dislike spending time on repairs or modifications.

- You cannot afford unexpected mechanical or electrical issues.

- You prefer modern safety, comfort, and fuel efficiency.

For most buyers, the E46 is a **project car** rather than a plug-and-play vehicle. If you re serious about owning one, treat it as an investment in a driving experience rather than a practical transportation solution. Start with a lower-mileage example, budget for maintenance, and enjoy the journey!

Details:

Buyer should verify this is the exact part needed before purchasing.

part #: 31427707625 price

  • $999.00

specifications mocycfra:

  • for models: Slider
  • for makes: Bmw
  • mpn: 31-42-7-707-625
  • type: Parts

seller mocycfra:

  • city: Columbus, Wisconsin
  • rating: 99.8%
  • # reviews: 15498

offer mocycfra:

  • started: April 14, 2026
  • sold: 0
  • quantity: 1
  • best offers: True
  • availability: In Stock
  • options: Ship-to-home

general mocycfra:

  • Motorcycle Scooter Parts Accessories > Body Frame > Frames Parts
  • condition: New

returns mocycfra:

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

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shipping mocycfra:

  • cost: $0.00
  • type: Fixed
  • transit: 2-4 Days
  • class: Standard
  • service: Standard
for models: slider, for makes: bmw, type: parts,
category: motorcycle parts > motorcycle scooter parts accessories > body frame > frames parts, sku: 17678017887803861,
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  • New. Offer #1 priced at $999.00 + $0.00 shipping estimate = $999.00* total. SLIDER TUBE LEFT.FREE SHIPPING

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