BenzUnited Parts
2014–2017 Mercedes E63 S AMG 4MATIC W212 / CLS63 S C218 M157 Catless Downpipes
2014–2017 Mercedes E63 S AMG 4MATIC W212 / CLS63 S C218 M157 Catless Downpipes
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Off-road and race use only. Not legal for street use or emissions-controlled vehicles. Intended for closed-course competition or off-road applications where permitted.
High-flow performance downpipes for Mercedes E63S (W212) & CLS63S (W218) 4MATIC, 2014–2017 — engineered for improved exhaust flow, sharper turbo response, and a deeper AMG exhaust character with OEM-like fitment and drivability.
Built for owners who want refined performance — not noisy compromises.
Hear It & See the Upside
- Performance potential: strong gains with ECU calibration (results vary by setup)
- Sharper response: reduced restriction supports quicker turbo spool
- Refined AMG tone: deeper under load without excessive harshness
- Built correctly: TIG-welded 304 stainless steel, direct bolt-on design
Technical Specs
- Material: High-grade 304 stainless steel
- Diameter: 3-inch piping
- Welds: Back-purged TIG welding
- Finish: Brushed/polished (batch dependent)
- Weight savings: approximately 10–15 lbs vs OEM (varies by vehicle/spec)
- Install time: typically 2–3 hours (professional installation recommended)
Why Fitment Matters on M157
The M157 bi-turbo packaging leaves limited space around heat shielding and fasteners. These downpipes are designed with platform-specific routing and sealing surfaces to support clean installation and serviceability.
Compatibility
| Year | Model | Engine |
|---|---|---|
| 2014–2017 | Mercedes E63S AMG (W212) 4MATIC | M157 V8 BiTurbo |
| 2014–2017 | Mercedes CLS63S AMG (W218) 4MATIC | M157 V8 BiTurbo |
Frequently Asked Questions
Will these downpipes work on the stock tune?
The vehicle may run without calibration, but ECU tuning is recommended for best drivability, performance optimization, and to manage emissions-related fault codes.
Will installing these trigger a check engine light?
Check engine lights may occur when running catless downpipes without ECU calibration.
Are these street legal?
No — these are intended for off-road or closed-course competition use only where permitted.
Why Buy from BenzUnited
We focus on Mercedes-Benz performance platforms, supporting both AMG and non-AMG applications with platform-aware parts and enthusiast-level guidance.
Each set is QC’d for fitment and designed for OEM-style installation points to reduce install friction and support long-term serviceability.
Fast U.S. shipping with tracking and support that understands the M157 platform.
Built for owners prioritizing fitment precision, sound quality, and platform-specific engineering.
