M276 Catless Downpipes l W213 Mercedes E43 AMG E400 E450 Heat Shielded

Upgrade your AMG with these heat-shielded catless downpipes for the Mercedes-Benz M276 3.0L BiTurbo engine. Engineered for serious performance and built to last, these downpipes don’t just free up exhaust flow — their integrated thermal shielding keeps exhaust energy where it belongs: inside the pipe. The result? Quicker turbo spool, cooler engine bay temps, and power that stays consistent even under heavy load.

🔥 Key Benefits

• ✅ Integrated Thermal Shielding: Retains heat inside the pipe to improve exhaust velocity, reduce turbo lag, and protect nearby components.
• ✅ Lower Engine Bay Temperatures: Up to 50% reduction in radiant heat — helps mitigate heat soak of intakes, hoses, and electronics.
• ✅ Catless Design: Maximum exhaust flow for a raw, aggressive AMG tone and quicker boost response.
• ✅ Improved Spool & Torque: Sharper throttle response and stronger midrange pull.
• ✅ Consistent Performance: Less heat bleed = steadier power during spirited driving and track sessions.
• ✅ Direct Bolt-On Fitment: Installs to OEM turbo outlets — no welding or fabrication required.
• ⚠️ Note: May trigger a CEL without tuning (ECU tune highly recommended for M276).

🚗 Vehicle Compatibility

• 2015–2016 Mercedes-Benz C400 / C450 (W205)
• 2017–2023 Mercedes-AMG C43 (W205)
• 2016–2018 Mercedes-Benz E400 (W213/C238/A238)
• 2018–2020 Mercedes-Benz E450 (W213/C238/A238)
• 2016–2018 Mercedes-AMG E43 (W213)

📈 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 unlocked on 93+ octane

🛠️ Install Notes

• Direct bolt-on fit — aligns perfectly with OEM turbo flange and mid-pipe.
• Integrated heat shielding — no additional wraps or coatings required.
• Average install time: 1.5–2.5 hours.
• ECU tuning recommended to eliminate CEL and maximize gains.
• Professional installation preferred for best results.

Warranty: 12-month coverage on welds, flanges, and structural integrity under normal use, plus a fitment guarantee for listed M276 applications. Off-road/track use where permitted.

💻 Optional ECU Tune – Bundle & Save

Pair these heat-shielded downpipes with our BenzUnited custom ECU tune for maximum results. Unlock the full potential of your M276 with:

• 91, 93, and 100 octane performance maps
• Adjustable burbles, sharper throttle mapping, and optimized boost/timing
• Optional handheld programmer 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.

🧾 Cosmetic Disclaimer

One unit has a small surface scratch on the BenzUnited Parts badge (see image). This is purely cosmetic and does not affect performance, fitment, or durability.

📦 Shipping & Availability

✅ In stock now — ships within 1 business day from California. Fully insured and trackable delivery for your peace of mind.