Grimmspeed Exhaust Valve Delete Module - Ford Focus RS 2016-2018 / 2015-2019 Mustang GT350 / 2013-2016 Audi S6 / 2015-2016 S3

GrimmSpeed Exhaust Valve Delete Module — Ford Focus RS / Mustang GT350 / Audi

The GrimmSpeed Exhaust Valve Delete Module bypasses the factory electronic exhaust valve control system, holding the exhaust valves permanently open. The factory valve system closes the valves at low RPM to reduce noise — deleting it removes the quiet mode and maintains full open exhaust sound at all times.

DETAILS

• Permanently holds exhaust valves open
• Eliminates factory valve close function
• Plug-and-play installation — no wiring modification
• Fitment: 2016-2018 Ford Focus RS / 2015-2019 Ford Mustang GT350 / 2013-2016 Audi S6 / 2015-2016 Audi S3

The factory electronic exhaust valve system is designed to close the exhaust valves at low RPM and light throttle, reducing exhaust noise for comfort. This produces a split exhaust character — quiet when the valves are closed, louder when they open. Many owners find the inconsistency undesirable and prefer the full open exhaust sound at all times.

The GrimmSpeed module intercepts the valve control signal and holds the valves in the open position regardless of RPM or throttle position. Plug-and-play installation connects to the factory valve wiring — no cutting, no splicing, no permanent modification required. The module is reversible.

What's in the Box

• GrimmSpeed exhaust valve delete module
• Installation instructions

Why Choose GrimmSpeed

GrimmSpeed has been engineering performance parts for Subaru platforms from their Portland, Oregon facility since 2003. Everything they make is designed around real-world use — their engineers drive the same cars their customers drive, which means product decisions are made with genuine platform knowledge behind them. GrimmSpeed designs parts in-house, sources quality materials, and validates fitment on the actual application before release. The result is parts that install correctly the first time, perform as advertised, and hold up under the conditions Subaru owners actually subject their cars to. Whether it is a critical engine component or a cosmetic upgrade, the same attention to detail and fit quality applies across the catalog.

The RallySport Take

The exhaust valve delete module is for Focus RS, Mustang GT350, and Audi S6/S3 owners who have decided the factory exhaust valve system is working against what they want from the exhaust note. The open valve sound is more consistent and more aggressive. Fits the 2016-2018 Ford Focus RS, 2015-2019 Ford Mustang GT350, 2013-2016 Audi S6, and 2015-2016 Audi S3.

Fitment