BenzUnited Parts
Heat Shielded Catless Downpipes – C43 AMG / C450 / C400 (M276)
Heat Shielded Catless Downpipes – C43 AMG / C450 / C400 (M276)
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Upgrade your AMG with these heat-shielded catless downpipes for the Mercedes-Benz M276 3.0L BiTurbo engine. Engineered for performance and reliability, these downpipes combine free-flowing design with advanced integrated thermal shielding — keeping exhaust energy inside the pipes where it belongs. The result: quicker turbo spool, lower engine bay temperatures, and consistent power with every pull.
✔️ Trusted U.S. Seller: Secure checkout, fast insured shipping, and live support.
📦 No local pickup needed: Every order ships safely and arrives ready to install.
🔒 100% authenticity guarantee: Every unit verified in-house before shipment.
🔥 Key Benefits
- ✅ Integrated thermal shielding – Retains exhaust heat, improving gas velocity and turbo efficiency
- ✅ Cooler engine bay – Up to 50% lower radiant heat, reducing heat soak and component wear
- ✅ Catless design – Maximizes exhaust flow and produces an aggressive twin-turbo AMG tone
- ✅ Faster turbo spool – Quicker boost response and sharper mid-range torque
- ✅ Direct bolt-on fitment – Fits OEM turbo outlets with no fabrication required
- ⚠️ Note: May trigger a CEL without tuning — ECU calibration recommended
Warranty: 12-month coverage on welds, flanges, and structural integrity under normal use, plus a fitment guarantee for listed M276 applications. For off-road/track use where permitted.
🔧 Vehicle Compatibility
- 2017–2023 Mercedes-AMG C43 (W205)
- 2015–2016 Mercedes-Benz C400 / C450 (W205)
- 2016–2018 Mercedes-AMG E43 (W213)
- 2016–2018 Mercedes-Benz E400 (W213/C238/A238)
- 2018–2020 Mercedes-Benz E450 (W213/C238/A238)
📈 Estimated Performance Gains
| Setup | HP Gain | Torque Gain | Notes |
|---|---|---|---|
| Downpipes Only | +15–20 HP | +20–30 lb-ft | Sharper response, aggressive tone |
| With ECU Tune | +60–70 HP | +80–100 lb-ft | Full potential on 93+ octane |
🛠️ Installation Details
- 100% bolt-on – fits OEM turbo flange and mid-pipe
- Built-in heat shielding – no need for external wrap or coatings
- Recommended lift or jack stands for accessibility
- Install time: approx. 2 hours
- Professional tuning recommended
⭐ Customer Confidence Guarantee: Every order includes insured shipping, tracking updates, and responsive U.S. support. Thousands of successful AMG installs nationwide.
💻 ECU Tune Bundle – Save When Bundled
- Three optimized maps (91 / 93 / 100 octane)
- Adjustable burbles, sharper throttle mapping, and limiter options
- Optional handheld programmer available for at-home flashing
Retail: $1,500 — Bundle Price: $1,125 with downpipes. Optional Handheld Programmer: $300.
Discount not applied in cart — contact us after checkout and our tuner will send a secure invoice and coordinate your calibration.
📦 Shipping & Support
✅ In stock now — Ships within 1 business day from California.
📦 Free insured U.S. shipping with tracking and signature confirmation.
🔧 24/7 fitment support from our AMG specialists.
