Mercedes-Benz C63 Blow Off Valve - Turbosmart - Kompact EM PlumBack VR29 - `15-`21. This Turbosmart Kompact EM PlumBack VR29 is a direct-fit blow off valve designed specifically for the 4.0L M177 in 2015–2021 C63 models, offering precise pressure relief and a refined compressor sound.

Made for enthusiasts who want a reliable upgrade, the Kompact EM PlumBack VR29 replaces the factory valve with a compact, purpose-built unit that fits the OEM locations and connects with existing vacuum and boost lines. It provides consistent venting behavior under varying boost conditions and is constructed from durable materials to withstand repeated use. Installation is straightforward for experienced techs and shops, and the unit maintains a clean under-hood appearance while delivering the auditory feedback many drivers prefer when lifting and reapplying throttle.

Features

• Direct-fit for 2015–2021 Mercedes‑Benz C63 4.0L (M177)
• Compact design to replace factory valve without major modification
• Controlled recirculation/venting for consistent response
• Robust construction for reliable operation under boost
• Includes necessary hardware for installation

If you have questions or want help confirming fitment, call us directly — our parts specialists can advise on installation and compatibility. We have two locations offering installation and customization services: Austin, Texas and Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA). If you are considering multiple items, contact us for shipping discounts. We install on premises at both locations.

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