1. Exhaust & Emission Parts To Buy
  2. sku: 20902142492512891
  3. MOPAR 4179906

MOPAR 4179906 Nos Emission Diverter Valve

fits make: Mopar.

4179906 Mopar Nos Emission Diverter Valve #

( Manufacturer Part Number: 4179906 ), ( Part Type: Valve ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review MOPAR Nos Emission Diverter Valve

The **Mopar 4179906 NOS Emission Diversion Valve** is a meticulously preserved, no-service (NOS) component designed to regulate exhaust flow in select Chrysler, Dodge, and Plymouth vehicles equipped with emissions control systems from the late 1960s through the early 1980s. This precision-engineered valve plays a critical role in maintaining proper exhaust gas recirculation (EGR) and positive crankcase ventilation (PCV) performance, ensuring compliance with federal emissions standards while optimizing engine efficiency. Crafted from high-quality materials, the valve features a durable stainless steel or brass construction, resistant to corrosion and wear, and is finished with a polished chrome or nickel-plated exterior for both functionality and aesthetic appeal. Its compact yet robust design incorporates a spring-loaded mechanism that precisely controls the diversion of exhaust gases, preventing backpressure buildup and reducing harmful emissions without compromising engine performance. Ideal for classic muscle cars, vintage cruisers, and restored vehicles from the Mopar era such as the iconic 1970s Charger, Challenger, or Coronet this NOS valve is a sought-after replacement for original equipment parts that have deteriorated over time due to exposure to heat, moisture, and mechanical stress. Whether restoring a high-performance engine or maintaining a show-quality classic, the **4179906 Emission Diversion Valve** ensures seamless integration with the vehicle s exhaust system, delivering both reliability and authenticity for enthusiasts who demand nothing less than factory-spec precision.

### **Pros and Cons of buying a Mopar 4179906 NOSE Emission Diversion Valve**

#### **Pros:**

1. **OEM Quality and Compatibility** This is a genuine Mopar (Chrysler) part, meaning it is designed to fit and function exactly as intended for the vehicle s emission system. It avoids potential issues that may arise from aftermarket parts that do not meet factory specifications.

2. **Reliability and Durability** As an OEM component, it is built to the same high standards as parts used in new vehicles. This reduces the risk of premature failure, especially in applications where the emission system must operate consistently over many years.

3. **Warranty Coverage** Purchasing from an authorized Mopar dealer or a reputable parts supplier often includes a warranty, providing peace of mind in case of defects or early failure.

4. **Emission System Integrity** The emission diversion valve plays a critical role in managing exhaust flow, particularly in vehicles with turbochargers or high-performance engines. A properly functioning valve ensures optimal engine performance and compliance with emissions regulations.

5. **Ease of Installation** Since it is a direct replacement part, installation is straightforward, requiring minimal modifications. The valve is designed to fit seamlessly into the existing system, reducing the risk of leaks or improper function.

6. **Compatibility with Turbocharged Engines** This valve is specifically designed for turbocharged applications, helping to divert exhaust gases efficiently during certain operating conditions (e.g., deceleration or low-load scenarios). This can improve turbo response and reduce backpressure.

7. **Support for Vehicle Modifications** If you are working on a modified engine (e.g., forced induction, tuning, or exhaust upgrades), an OEM-quality valve ensures that the emission system remains functional and reliable, preventing potential issues with emissions tests or drivability.

---

#### **Cons:**

1. **Cost** As an OEM part, the Mopar 4179906 valve is more expensive than many aftermarket alternatives. This can be a significant investment, especially if the vehicle is older or if you are on a tight budget.

2. **Limited Availability** Depending on the region or supplier, genuine Mopar parts may not always be in stock, requiring additional time or effort to source. Some online retailers or specialty shops may carry it, but availability can be inconsistent.

3. **Potential Overkill for Basic Repairs** If the valve is failing due to a minor issue (e.g., a cracked seal or a loose connection) rather than a complete failure, replacing the entire valve may be more expensive than necessary. In some cases, a simpler repair (e.g., replacing a gasket or cleaning the valve) could suffice.

4. **Compatibility with Non-OEM Modifications** If the vehicle has been heavily modified (e.g., with non-standard exhaust manifolds, turbochargers, or tuning), the OEM valve may not fully integrate with the new setup. In such cases, an aftermarket valve designed for the modified system might be a better fit.

5. **Warranty Limitations** While OEM parts often come with warranties, these may have restrictions (e.g., limited coverage, voided if the vehicle has been modified, or requiring proof of purchase). Always review the warranty terms before purchasing.

6. **Potential for Counterfeit Parts** When buying online, there is a risk of receiving a counterfeit or low-quality part disguised as genuine Mopar. To mitigate this, purchase from authorized dealers or reputable suppliers with verified authentication processes.

7. **Installation Complexity in Some Cases** While the valve itself is relatively simple to install, some vehicles may require additional steps (e.g., removing the turbo, disconnecting sensors, or adjusting wiring). If you are not experienced with engine work, professional installation may be necessary, adding to the cost.

---

### **Conclusion**

The Mopar 4179906 NOSE Emission Diversion Valve is a high-quality, reliable part that ensures proper function of the emission system in turbocharged Chrysler vehicles. Its OEM status guarantees compatibility, durability, and peace of mind, particularly for those who prioritize performance and compliance with emissions standards. However, the higher cost and potential overkill for minor repairs may make it less ideal for budget-conscious buyers or those dealing with non-standard modifications.

For most owners who need a direct replacement for a failing valve in an unmodified or stock-turbo vehicle, this is the best choice. If cost is a concern or if the vehicle has extensive modifications, an aftermarket alternative (from a trusted brand) could be worth considering after thorough research.

---

### **Recommendation**

- **Buy the Mopar 4179906 valve if:**

- You need a genuine, reliable replacement for a failing OEM valve.

- Your vehicle is stock or has minimal modifications.

- You are willing to invest in a high-quality part with warranty support.

- You plan to maintain compliance with emissions regulations.

- **Consider an aftermarket alternative if:**

- You are working with a modified engine or exhaust system where an OEM valve may not be ideal.

- Budget constraints make the OEM part unaffordable, and you can find a reputable aftermarket valve with good reviews.

- The failure is minor (e.g., a seal or gasket issue), and a simpler repair would suffice.

- **Where to Purchase:**

- Authorized Mopar dealers (e.g., Chrysler dealership parts departments).

- Reputable online retailers with verified OEM parts (e.g., RockAuto, Summit Racing, or local specialty shops).

- Avoid unknown sellers to prevent counterfeit parts.

- **Installation Tips:**

- Follow the vehicle s service manual for specific steps.

- Ensure all connections (electrical and mechanical) are secure.

- Test the valve after installation to confirm proper function (e.g., check for leaks or unusual noises).

Ultimately, the Mopar 4179906 valve is the safest choice for most applications, but weigh the pros and cons against your specific needs before making a decision.

Details:

NOS MOPAR Emission Diverter Valve # 4179906 used in 70 80 dodge trucks.

part #: 4179906 prices

  • $80.00-$174.99

specifications emissyste:

  • for makes: Mopar
  • mpn: 4179906
  • part type: Valve
  • vintage part: Yes
  • country of origin: United States

general emissyste:

  • condition: New
  • Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts

returns emissyste:

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

seller emissyste:

  • city: Monessen, Pennsylvania
  • # reviews: 996
  • rating: 100.0%

shipping emissyste:

  • carrier: USPS
  • cost: $6.00
  • type: Fixed
  • service: USPS Ground Advantage
  • class: Standard
  • transit: 4-8 Days

offer emissyste:

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

payments emissyste:

  • other
  • credit card: Diners-club
  • wallet: Apple-pay
for makes: mopar, part type: valve, vintage part: yes, country of origin: united states,
category: auto parts > car truck parts accessories > exhaust emission systems > exhaust emission parts, sku: 20902142492512891,
Mopar 4179906 Is Similar To:
emissyste logo
2 offers $80.00–$174.99 USD
  • New. Offer #1 priced at $80.00 + $6.00 shipping estimate = $86.00* total. NOS MOPAR Emission Diverter Valve # used in 70&80 dodge trucks.+$6.00 shipping
  • New other (see details). Offer #2 priced at $174.99 + $0.00 shipping estimate = $174.99* total. Actual item may vary slightly on details that don't affect its performance.FREE SHIPPING

Copyright © emissyste.com