AWE - Save Up to 15%
  See more parts for your Audi A4

Forge Motorsport Replacement Bypass Valve Kit Audi A4 1.8 | 2.0 TFSI 2009-2022


Forge Motorsport


Free Shipping

Shopper Award

This valve represents the latest evolution of part number FMFSITAT, and is a hybrid of sorts, that combines Forge Motorsport's existing full replacement solenoid controlled recirculating valve with Forge Motorsport's blow-off valve adapter. The result is a full replacement atmospheric blow-off valve that integrates seamlessly with the OEM electronics and results in absolutely no fault codes, no check engine lights, and no detriment to the performance of the vehicle in any way. Like Forge Motorsport's full replacement recirculating valve option, the FMFSITVR, the FMFSITAT is fully engineered to remedy the failure issues experienced with the OEM solenoid valves when their diaphragm may rupture which would effectively result in a boost leak.

Forge Motorsport's valve uses full billet alloy construction with a piston based internal design that provides for significantly improved reliability over the OEM valves along with lightning fast response. This valve is particularly well suited to the B7 and B8 chassis Audi A4 and A5 with the 2.0T engine. The valve mounting location on these vehicles is positioned particularly close to the frame rail of the chassis, and the overall installed height of Forge Motorsport's standard replacement valve and spacer combination is such that it conflicts with the chassis at this location.


  • Unique slots machined in the body of the valve allow for a more effective and quicker release of air, due to larger surface area
  • New and unique sound for the atmospheric model
  • Billet construction from aerospace grade aluminium
  • No fault codes and no check engine lights
  • Full instructions and all parts necessary for installation included
In the box:
  • 1 x FMFSITAT Valve
  • 1 x Wiring Harness
  • 1 x Solenoid, Bracket, and Screws
  • 1 x PCV Adaptor Kit
  • 1 x Blue Spring (Uprated)
  • 10 x Cable Ties
  • 1 x 2000mm Length of 4mm Vac Hose
  • 1 x Instruction Booklet
  • 1 x Forge Keyring and Sticker
  • This will ONLY fit the 1.4 turbo engines up to early 2013, where the turbo is mounted at the front of the engine bay.
  • It will not fit engine codes CMBA & CxSB.

Proposition 65

/!\ warningWARNING: Cancer and Reproductive Harm

Vehicle Engine Notes
Audi A4

Audi A4 Allroad

Audi A4 Avant

Audi A4 Quattro

About Forge Motorsport

Forge Motorsport is a world leader in aftermarket car parts, that includes actuators, intercoolers, blow-off valves, fabricated alloy tanks, big brake kits, wastegates, and silicone hoses. The company was founded in 1996 with the simple principles of innovation, crafty designs, and high-quality manufacturing. The company is comprised of passionate petrolheads who are dedicated to designing and developing vehicle-specific performance parts for OEM And turbocharged applications. 

If you are looking to get the most out of your Audi, BMW, or Volkswagen’s performance, you can count on Forge Motorsport in the United Kingdom. Each individual Forge branded product proudly states “Made In Great Britain.” Forge Motorsport is based out of Gloucester, England, where its headquarters and manufacturing plants produce its ever-growing lineup of products. The company also has a full sales and distribution facility in Orlando, Florida (Forge USA) and one in Taichung, Taiwan (Forge Asia) 

Forge Motorsport’s Manufacturing Process

All Forge Motorsport products are manufactured in-house in its state-of-the-art CNC machine shop by a team of highly skilled engineers and fabricators. All Forge production is controlled by the international ISO 9002 standard for manufacturing design and development. Billet parts are machined to the strictest tolerances and undergo exhaustive testing and inspection before they are released. All welding is also done in-house, by Forge’s in-house craftsmen, and boasts unsurpassed quality and robotic-like precision. Not only do Forge Motorsport’s products look great but they also perform second to none. What’s more, all Forge products are guaranteed for life and backed by Forge’s “No Hassle” service promise.

With immense knowledge at its disposal, Forge is honored to supply the leading names and race teams in the world of motorsport, including F1, Rally X, WRC, and Le Mans, as well as several OEM manufacturers. 

Forge Motorsport at Vivid Racing

Vivid Racing carries a wide array of Forge Motorsport parts, including intercoolers, big brake kits, blow-off valves, wheel spacers, wastegates, turbo hoses, intakes, radiators, and much more! If you cannot find a specific item above or have any general questions, please do not hesitate to call our expert sales team at (480) 966-3040. We are here to make the buying experience a simple and pleasant one.

Forge Motorsport are one of the largest manufacturers of aftermarket turbo accessories, bringing cutting edge design and the highest quality to our product line, we strive every day to bring excellence to our customers. Sometimes, things can go wrong and we want YOU the customer to know you will be looked after beyond any level of customer service you have ever experienced before. With that in mind, the Forge Motorsport (Limited) Lifetime Warranty covers only products that have been purchased directly from us, or one of our authorised distributors/dealers.

If your Forge product fails or breaks due to a manufacturing issue or defect, we will repair or replace, at no charge to the customer at our discretion. This service will only be carried out IF the Forge product is still in its original unchanged design condition and the item/product has not been modified or changed in anyway. The Forge Motorsport (Limited) Lifetime Warranty will not cover any damage or failure caused by; improper or incorrect installation, normal wear and tear, finished colour/aesthetic appearance of the product, the normal degradation of material over time, or if the product has been exposed to the use of any Traffic Film Remover or alternative acidic cleaner (commonly used in hand car washes).

The warranty will also be invalid if the Forge product has not been fitted to correct applications that it was designed for. Any damage to Forge products that occur outside of the warranty can be sent in for evaluation and a quotation to repair or replace said product along with a return shipping fee. The Forge products that are covered by our (Limited) Lifetime Warranty are to the original purchaser or owner of the Forge item for the lifetime of that said product only. The warranty policy is NOT TRANSFEREABLE However given the quality of the product that Forge manufacture we are confident of great longevity of your “Engineered for Performance” Forge part.

For any warranty claim or query please contact our Forge Motorsport sales team in your region or country. UK & EU USA and South America Asia

Any shipping or returns to Forge Motorsport must be insured, pre-paid and include a Forge Motorsport Goods Returns Form and a copy of the original invoice or proof of purchase to allow us to better serve you. The terms and conditions to the Forge Motorsport (Limited) Lifetime Warranty policy are subject to change at any time without notice.

Please note, Pipercross filters are excluded from our Lifetime Warranty

Check out these other great products