How Active Exhaust Valves Work With 2018 Ford Mustang GT

Out With The Old

BORLA Performance Industries has developed its own patented Pocket Valve technology to allow its exhaust systems to retain the vehicle’s factory dual-mode or active valve functionality without restricting the flow of exhaust gases leaving the engine.

Many new cars feature some kind of exhaust system valve technology. These valves are generally designed to operate at different engine speeds to attenuate sound levels. Most manufacturers employ selectable or active systems. These allow the driver to choose the noise level. The purpose is to provide a quiet car until the opportunity presents itself to hit the loud pedal. At this point, the valves open to allow the allow the vehicle to produce a louder, sportier exhaust note.

While developing its performance exhaust applications for new vehicles, BORLA engineers need to understand how the stock exhaust valves systems operate so they can ensure the BORLA systems function in the same way. The video posted below was filmed during a test session using the 2018 Ford Mustang GT. The BORLA engineers removed the Ford valves from the stock exhaust and placed them inside the car so they could study the activation in the Mustang’s different driving modes.

In With The New


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Borla Performance Industries






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ABOUT Borla Performance Industries®

BORLA® is committed to providing world-class exhaust products which surpass the expectations of our customers. To that end, our facility is complete with a state-of-the art test and development center where we are continually improving our manufacturing efficiency and standards. We have pioneered a variety of improvements in the design of performance exhaust systems. Alex Borla currently holds several US patents for innovative exhaust system technology, and the company has won numerous "Best New Product" awards in the industry. Every BORLA® Cat-Back™ system, Header and Axle-Back is made from austenitic stainless steel (superior to 409 or aluminized steel) employing mandrel-bent tubing, all-welded construction, and is designed for accurate fit and easy installation. Over 30 years experience and special merge collector technology provide the ultimate in power and endurance.