GFB GO FAST BITS T9381-CO Diverter Valve

( Brand: Gfb Go Fast Bits ), ( Manufacturer Part Number: T9381-CO ), ( Part Type: Valve ), ( Manufacturer Warranty: 1 Year ), ( Length: 6 In ), ( Title: Dv ), ( Adjustable: No ), ( Prop 65 Yes/no: Yes ), ( Country Of Origin: Austrailia )

Review GFB GO FAST BITS Diverter Valve Audi fits QUATTRO RS 2015–2018

The **GFB Go Bits T9381-CO Diverter Valve** is a high-performance, precision-engineered component designed specifically for the **2015 2018 Audi Quattro** models, including the S3, RS3, and high-performance variants featuring the **2.0L TFSI turbocharged engine** with the **T9381 code**. This diverter valve plays a critical role in optimizing the exhaust gas recirculation (EGR) system by efficiently managing the flow of exhaust gases, reducing backpressure, and enhancing overall engine efficiency. Crafted from durable **stainless steel**, the valve is built to withstand the extreme temperatures and pressures encountered in high-performance applications, ensuring long-term reliability and resistance to corrosion. Unlike stock components, the GFB Go Bits diverter valve features a **smooth, precision-machined design** that minimizes turbulence and maximizes airflow, contributing to improved throttle response, better fuel economy, and reduced engine strain. This aftermarket upgrade is particularly beneficial for drivers seeking to restore or enhance the performance of their Audi s EGR system, which may degrade over time due to carbon buildup or wear. The diverter valve integrates seamlessly with the stock EGR cooler and related components, making installation straightforward for those with basic mechanical experience or for professionals. Whether you're aiming to eliminate EGR-related issues, improve exhaust flow, or simply maintain peak engine performance, the **GFB Go Bits T9381-CO Diverter Valve** offers a cost-effective and high-quality solution that adheres to Audi s technical specifications while exceeding the durability of OEM parts.

Buying a **GFB Go Bits T9381-CO diverter valve** for a **2015-2018 Audi Quattro** (or any modern turbocharged vehicle with a similar setup) can be beneficial for certain applications, but it also comes with trade-offs. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of the GFB Go Bits T9381-CO Diverter Valve**

1. **Improved Turbocharger Efficiency**

The diverter valve helps manage exhaust flow by redirecting excess gas away from the turbo during high-load conditions (e.g., late throttle blips or aggressive driving). This reduces turbo lag and allows the turbo to spool faster in subsequent pulses, which can improve throttle response in certain driving scenarios.

2. **Compatibility with Stock and Mildly Tuned Engines**

The T9381-CO is designed to work with stock or lightly tuned Audi engines (e.g., 2.0L TFSI with stock turbo). It can be a good intermediate solution before investing in a full turbo upgrade or more aggressive tuning.

3. **Easy Installation**

GFB Go Bits products are known for their straightforward installation process. The diverter valve typically requires minimal modifications (e.g., cutting a small section of the exhaust manifold or piping) and can be installed without major welding or custom fabrication.

4. **Cost-Effective Upgrade**

Compared to a full turbo swap or custom exhaust system, the diverter valve is relatively inexpensive. It offers a modest performance boost without requiring a full engine rebuild or major modifications.

5. **Potential for Better Fuel Economy in Certain Conditions**

In some cases, the diverter valve can help optimize exhaust flow, which may slightly improve fuel efficiency by reducing backpressure and allowing the turbo to work more efficiently under certain driving conditions.

6. **Retains Stock Sound Characteristics**

Unlike aggressive exhaust systems, the diverter valve does not drastically alter the exhaust note. It maintains a relatively stock-like sound while still providing performance benefits.

7. **Works with Stock Intercooler and Cooling Systems**

Since it doesn t drastically alter exhaust flow, the diverter valve is less likely to cause overheating issues in the intercooler or cooling system compared to more aggressive modifications.

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### **Cons of the GFB Go Bits T9381-CO Diverter Valve**

1. **Limited Performance Gains**

The diverter valve is not a dramatic upgrade. It may reduce turbo lag slightly and improve spool times in specific situations (e.g., late throttle blips), but it does not provide the same level of power or responsiveness as a full turbo upgrade, custom tuning, or a high-flow exhaust system.

2. **Not Suitable for High-Power Applications**

If you plan to run significant power (e.g., 300 hp or more aggressive tuning), the stock turbo and exhaust system may not handle the increased flow. The diverter valve alone will not be sufficient, and you may still need a larger turbo, upgraded intercooler, or reinforced exhaust components.

3. **Potential for Increased Exhaust Temperatures**

While the diverter valve helps manage exhaust flow, it can also redirect some heat back toward the engine or turbo housing in certain conditions. This may lead to slightly higher exhaust gas temperatures (EGT) under heavy loads, which could stress the turbo or catalytic converter over time.

4. **Requires Proper Tuning for Optimal Performance**

The diverter valve works best when paired with a tune that accounts for the altered exhaust flow. Without a proper tune, you may not see noticeable benefits, and in some cases, the engine may run poorly or exhibit rough idle issues.

5. **Limited Longevity with Aggressive Use**

The stock turbo in a 2015-2018 Audi Quattro is not built for high-power applications. While the diverter valve can help, it does not address the underlying limitations of the stock turbo. Over time, aggressive use (e.g., frequent high-load driving) can still lead to turbo failure or other exhaust system issues.

6. **May Not Be Necessary for Stock or Mildly Tuned Applications**

If you are not experiencing noticeable turbo lag or poor spool times with your stock setup, the diverter valve may not provide enough of a benefit to justify the cost. Many stock or mildly tuned Audi engines run well without it.

7. **Potential for Increased Backpressure in Some Cases**

Depending on how the diverter valve is installed and tuned, it could inadvertently create backpressure in certain exhaust pulses, which might negate some of the intended benefits. This is why proper tuning is critical.

8. **Not a Permanent Solution for Turbo Lag**

Turbo lag is often caused by a combination of factors, including turbo size, intercooler efficiency, and tuning. The diverter valve addresses only one aspect of this issue. If you want to eliminate turbo lag entirely, you may need a larger turbo, upgraded intercooler, or a more aggressive tune.

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### **Conclusion**

The **GFB Go Bits T9381-CO diverter valve** is a useful intermediate upgrade for a **2015-2018 Audi Quattro** if you are looking to slightly improve turbo spool times and reduce lag in specific driving conditions (e.g., late throttle blips or aggressive driving). It is a cost-effective and relatively easy modification that can enhance performance without requiring major changes to the engine or exhaust system.

However, it is not a game-changer. The gains are modest, and it is not suitable for high-power applications. If you are running significant power or plan to push the engine aggressively, you will likely need additional upgrades (e.g., a larger turbo, upgraded intercooler, or custom exhaust) to fully realize the benefits.

For stock or mildly tuned Audi engines, the diverter valve may not be necessary if you are already happy with the stock performance. It is best suited for those who want a small but noticeable improvement in turbo response without committing to a full exhaust or turbo upgrade.

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### **Recommendation**

- You notice mild turbo lag or slow spool times in your 2015-2018 Audi Quattro.

- You want a simple, cost-effective way to improve throttle response without major modifications.

- You plan to pair it with a tune that optimizes exhaust flow for your driving style.

- You are not running high power (e.g., under 250 hp) and want to avoid a full turbo swap.

- You are satisfied with your stock or mildly tuned Audi s performance.

- You plan to run significant power (e.g., 300 hp) and need a more substantial turbo or exhaust upgrade.

- You are not willing to invest in a tune to properly calibrate the diverter valve.

- You prioritize simplicity and do not want to deal with potential tuning or exhaust temperature issues.

- You want more dramatic performance gains: A larger turbo (e.g., Garrett GTX or BorgWarner), upgraded intercooler, or a custom exhaust system may be better long-term investments.

- You are experiencing other issues (e.g., poor fuel economy, rough idle, or turbo failure): Addressing these problems first (e.g., with a tune or upgraded turbo) may be more beneficial than adding a diverter valve.

In summary, the GFB Go Bits T9381-CO is a worthwhile upgrade for those seeking a modest improvement in turbo response, but it is not a replacement for more aggressive performance modifications. Always pair it with a proper tune and monitor your engine s health to ensure longevity.

Details:

Our philosophy at GFB is to produce exceptional automotive products that are built with the same precision, machining quality, and reliability foundation of our reputation. Pro thane Front Suspension Stabilizer Bar Bushing for 1991 1994 Ford Bronco. GFB Go Fast Bits Diverter Valve for 2015 2018 Audi TT RS Quattro. Painless Wiring Dash Indicator Light Set.

part #: t9381 prices

• $242.10-$252.45

specifications emissyste:

• for models: Rs, Quattro
• for makes: Audi
• for years: 2015-2018
• brand: Gfb Go Fast Bits
• mpn: T9381-co
• part type: Valve
• manufacturer warranty: 1 Year
• length: 6 In
• title: Dv
• adjustable: No
• prop 65 yes/no: Yes
• country of origin: Austrailia

returns emissyste:

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

payments emissyste:

• other
• credit card: Diners-club
• wallet: Google-pay

seller emissyste:

• city: Hatfield, Pennsylvania
• # reviews: 68401
• rating: 99.8%

general emissyste:

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

shipping emissyste:

• class: Standard
• cost: $14.99
• transit: 4-8 Days
• carrier: UPS
• type: Fixed
• service: UPS Ground

offer emissyste:

• options: Ship-to-home
• quantity: 3
• availability: In Stock
• started: May 31, 2026
• sold: 0

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