Mercedes-Benz C63 Blow Off Valve - Turbosmart - Kompact Dual Port - `15-`21. A direct-fit Kompact EM DualPort blow off valve designed for the 4.0L M177 C63 (2015–2021) to replace the factory bypass valve with a robust aftermarket option.

This Turbosmart Kompact DualPort (VR29) unit offers precise boost relief and selectable venting behavior for owners who want a reliable, vehicle-specific upgrade. Built to integrate with the M177 intake system, the Kompact EM design addresses space constraints while providing a serviceable, high-flow solution. It allows you to choose between recirculating or atmospheric venting, helping tailor response and sound without altering factory turbo or engine management hardware.

Features

• Direct-fit for Mercedes‑Benz C63 4.0L (M177) model years 2015–2021
• Kompact DualPort VR29 design — recirculate or vent-to-atmosphere selectable
• Compact footprint engineered for tight engine bay packaging
• Serviceable construction for routine maintenance and longevity
• Designed to work with factory boost control and vacuum lines

If you have questions about fitment, functionality, or installation, please call us directly — our specialist staff can walk you through compatibility and options. We offer installation and customization services at both of our locations in Austin, Texas and the Los Angeles, California area. Call us at 512-982-9393 (TX) or 562-981-6800 (CA).

If you're considering purchasing multiple items, contact us for possible shipping discounts. We perform on‑premises installation at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov