Mercedes-AMG M177 & M178 Spool Vent-to-Atmosphere BOV Adapters

Spool vent-to-atmosphere blow-off valve adapters let Mercedes-AMG M177 and M178 V8 cars release excess boost to the air instead of recirculating it, so you hear the turbos on every lift.

Why you need it

From the factory, the AMG system routes excess boost back into the intake and mutes the turbo sound. These adapters vent it to atmosphere for a sharp, noticeable dump when you lift off the throttle. It adds no power, it just makes the car more engaging, and it is even more noticeable on convertibles with the top down.

Fits

• Mercedes-AMG C63 / C63 S Sedan, Coupe and Cabriolet (W205 / C205 / A205)
• Mercedes-AMG E63 S Sedan and Wagon (W213 / S213)
• Mercedes-AMG GLC63 / GLC63 S SUV and Coupe (X253 / C253)
• Mercedes-AMG GLE63 S SUV and Coupe (W167 / C167)
• Mercedes-AMG GLS63 (X167)
• Mercedes-AMG GT63 / GT63 S and GT63 S E Performance (X290)
• Mercedes-AMG GT, GT S, GT C, GT R and GT Black Series (C190 / R190)
• Mercedes-AMG SL63 (R232)
• Mercedes-AMG G63 (W463)

Features

• Vents excess boost to atmosphere on lift-off
• Noticeable turbo discharge sound
• No change in power or performance
• Simple install with no tuning required

Good to know

These adapters change sound only and do not add power. The effect is strongest on convertible models.