Mercedes-AMG C63 W205 — Stock vs YPG Tuned

503 HP Stock → 700 HP Stage 2 — Same Car, Same Engine, Completely Different Animal

The video above is a back-to-back comparison of the same Mercedes-AMG C63 W205 — first in completely stock configuration, then with YPG Motorsport catless downpipes and a Stage 2 ECU calibration. No other modifications. Same car, same day, same exhaust microphone position.

The difference is not subtle. The stock C63 sounds refined and contained — exactly how Mercedes engineered it. With the catalytic converters removed and the ECU recalibrated, the M177 4.0L twin-turbo V8 opens up completely: a deeper, rawer, more aggressive tone at every RPM, with pronounced burbles, crackles, and pops on the overrun that the stock car simply cannot produce.

The Numbers

What You Need for Stage 2

A complete Stage 2 build requires exactly two things: downpipes and an ECU calibration. No other hardware modifications are necessary.

Total investment for a 660–700 HP C63 S: $3,298.99 to $5,398 depending on downpipe choice. Every component ships worldwide with free delivery. GCC stock available for same-week dispatch.

World Record Proven

YPG Motorsport holds the world record for the first sub-10-second W205 C63 quarter mile — 9.97 seconds at 828 WHP, set at Beech Bend Raceway Park, Kentucky on April 9, 2019. The same M177 platform, the same downpipe design, the same tuning methodology. When you buy from YPG, you are buying from the team that built the fastest C63 in history.

The Last V8 C-Class

Mercedes replaced the W205 C63 with the W206 C63 S E Performance — a 2.0-liter four-cylinder hybrid. The V8 is gone from the C-Class permanently. For owners who want to extract everything the M177 has to offer while values hold, a Stage 2 build is the highest-return modification you can make.

YPG Motorsport — ECU Calibration & Performance Parts Since 2011 — Kuwait // Worldwide