GrimmSpeed 2015+ Mustang GT350/GT350R Exhaust Valve Defeat Module (grmGRM070044)

OFF-ROAD OR MOTORSPORTS USE ONLY. This part is not CARB legal. It is not legal for sale or use on pollution-controlled motor vehicles in California or in other states that follow California emissions rules. It is sold for off-road or motorsports use only.

This is the GrimmSpeed 2015+ Mustang GT350/GT350R Exhaust Valve Defeat Module. Part grmGRM070044.

Product details

• Part type: Sound Kits & Valve Controllers
• GrimmSpeed part number: grmGRM070044

Fitment

• Vehicle: Ford Mustang (S550)
• Years and trims on file: 2015-2020 Ford Mustang [Shelby GT350/Shelby GT350R]
• GrimmSpeed part number: grmGRM070044
• Application listing: GrimmSpeed 2015+ Mustang GT350/GT350R Exhaust Valve Defeat Module
• Check the vehicle, model years, engine and trim above against your car before ordering. Not sure? Ask us and we will check it against your VIN.

Emissions and noise: off-road or motorsports use only

This part is not CARB legal and is sold for off-road or motorsports use only. It is not intended for use on vehicles driven on public roads. By ordering, the buyer accepts responsibility for checking and following federal, state and local emissions and noise laws where the vehicle is used. Questions? Ask us before you order.

Shipping & returns

• Orders are processed within 1–3 business days; standard delivery is 3–7 business days within the United States.
• GrimmSpeed parts are supplied through our distributor. We confirm availability and lead time with you after you order.
• We currently ship within the U.S. only. See our Shipping Policy.
• 30-day returns on unused parts in original packaging — see our Return Policy.

Installation at Team ANBD

Team ANBD is a performance shop in Andover, New Jersey. We can align or corner-balance the car, and prep track cars. Book an appointment or ask us about installation and fitment before you order.