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BenzUnited Parts

M274 Catless Downpipe for 2015–2021 Mercedes C300 W205 E300 W213

M274 Catless Downpipe for 2015–2021 Mercedes C300 W205 E300 W213

$449.00 USD
$495.00 USD $449.00 USD
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M274 Catless Downpipe – C300 / E300 / GLC300

Refined sound • Quicker turbo response • OEM-style fitment

The factory catalytic converter on the M274 2.0L turbo sits directly after the turbo and creates major exhaust restriction. This high-flow catless downpipe removes that bottleneck for quicker spool, stronger mid-range torque, and a sharper note — pairs well with ECU calibration.

🎧 Sound Reference

Catless Downpipe
Removes the factory cat restriction right after the turbo for noticeably quicker spool and stronger mid-range torque — while staying suitable for daily driving.
OEM-Fit Construction
Bolt-on fitment with correct O₂ bung placement, CNC-machined flanges, and TIG welds. Uses factory mounting points — no cutting required. New OEM gasket recommended for best seal.
⚡ Pair with M274 ECU tune to unlock full boost and drivability

Removing the factory cat triggers a check engine light (CEL). Proper calibration disables the CEL, adjusts fueling and ignition maps, and removes factory torque limits — all while the car retains its built-in protection systems.

Up to +55 HP / +75 TQ with proper ECU calibration.

⚙️ Compatibility – U.S. Market

Model Chassis Years Engine
Mercedes-Benz C300 W205 / C205 / A205 2015–2021 M274 2.0L Turbo
Mercedes-Benz E300 W213 2017–2020 M274 2.0L Turbo
Mercedes-Benz GLC300 X253 2016–2019 M274 2.0L Turbo

Off-road and competition use only. Not legal for street use.

🏁 Why Choose Us for Your M274 Build

  • Backed by 10+ years of Mercedes performance expertise
  • Proven across street, track, and dedicated race car applications
  • Precision fitment on C300, E300, and GLC300 platforms
  • We only sell parts we run and test on our own cars

Same-day U.S. shipping • Expert fitment support • Platform-specific parts

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