BenzUnited Parts
M276 Catless Downpipes – Mercedes-AMG C43 W205 / E43 W213 3.0L V6 BiTurbo
M276 Catless Downpipes – Mercedes-AMG C43 W205 / E43 W213 3.0L V6 BiTurbo
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These high-flow catless downpipes for the M276 3.0L BiTurbo V6 replace the factory catalytic converters, a major bottleneck on the C43 / E43 / E450 platform. Once installed, you'll notice quicker turbo spool, sharper throttle response, and a deeper, harder-edged note under load. Up to 485 HP / 530 lb-ft when paired with our M276 ECU tune.
- Raw Stainless — untreated 304 stainless steel.
- Ceramic Coated — a real reduction over raw stainless. Much lighter than heat shielding, and adds flex sections to absorb engine movement and thermal expansion.
- Heat Shielded — cuts radiant heat by up to 80%, keeping under-hood temperatures down and protecting nearby engine bay components.
Select yours in the selector above.
Deciding between them? Which M276 downpipes are best — Raw vs Ceramic vs Heat-Shielded → and what shielding a downpipe actually does →
Real Sound Demo
Key Features & Benefits
- Direct Bolt-On — No cutting or fabrication required; installs in 2–3 hours. Professional installation is recommended
- TIG-Welded 304 Stainless Steel — machined flanges for leak-free, factory-spec connections with 3.0″ primary and 2.0mm wall thickness
- Reduced Exhaust Backpressure — Allows the turbos to spool more efficiently and build boost faster under load
- Faster Boost Onset — less backpressure lets the turbos spool sooner, so the car responds quicker and pulls harder between gears. The power gain arrives with the tune
Complete the Stage 2 Build
Purchase our fully optimized M276 Stage 2 ECU tune to take advantage of the extra flow from catless downpipes and clear the check-engine light the catless design will otherwise set.
Compatibility
| Chassis | Years | Models |
|---|---|---|
| W205 Sedan | 2015 | C400 4MATIC |
| W205 Sedan | 2016 | C450 AMG 4MATIC |
| W205 Sedan | 2017–2021 | C43 AMG 4MATIC |
| C205 Coupé / A205 Cabriolet | 2017–2023 | C43 AMG 4MATIC |
| W213 / C238 / A238 | 2017–2018 | E43 AMG 4MATIC |
| W213 / C238 / A238 | 2017–2018 | E400 4MATIC |
| W213 / C238 / A238 | 2019 | E450 4MATIC |
Warranty, Shipping & Returns
- 12-month structural warranty — covers welds, flanges, and structural integrity under normal street use
- Free U.S. shipping with tracking, shipped next business day from US stock
- 30-day returns — unused and in original packaging. See full return policy →
Frequently Asked Questions
Do these require a tune?
They fit and run fine on a stock car, and the sharper throttle response is immediate. The power arrives with the calibration. A tune is highly recommended for maximum performance and to clear fault codes.
Will I get a check engine light?
Removing the catalytic converters will typically set a catalyst-efficiency code on an untuned car. A tune clears this properly — we do not recommend defeat devices. Full explanation →
Are they catless?
Yes — fully catless. Intended for off-road, track, and racing use only.
What is the difference between the three finishes?
Same catless core, same 3.0″ primary, identical flow on all three. What changes is radiant heat off the pipe. Raw Stainless is untreated 304. Heat Shielded cuts radiant heat by up to 70–80%, which keeps under-hood temperatures down and protects wiring and sensors routed near the exhaust. Ceramic Coated lands between the two — a real improvement over bare stainless but not as effective as full shielding — and adds flex sections at both ends to absorb engine movement and thermal expansion.
Will they fit my exact vehicle?
Check the table above — it splits by model and year because Mercedes renamed this car twice. On the C-Class: C400 is 2015, C450 AMG is 2016, and C43 AMG is 2017–2021 as a sedan and 2017–2023 as a Coupé or Cabriolet. On the E-Class: E43 AMG and E400 are 2017–2018, E450 is 2019. These are built for the W205 / C205 / A205 and W213 / C238 / A238 chassis and nothing else — the 2023 and newer C43 Sedan is a W206 with a four-cylinder and is not covered.
How long does installation take?
Professional shops typically complete the install in 2–3 hours.
Off road use only. Not legal for use on emissions-controlled vehicles or public roads.
