Transform your Mercedes with bolt-on upgrades engineered for the 3.0L M276 bi-turbo V6. Gain real horsepower, quicker turbo spool, deeper exhaust note, and sharper response—while keeping daily drivability and reliability intact.
From catless downpipes that free up exhaust flow to custom ECU tuning that eliminates CEL and unlocks untapped potential, these parts are fitment-tested across the M276 platform for seamless installs.
Collection Highlights
- ✅ 100% fitment for M276-powered models including C43 AMG, C450, C400, E43 AMG, GLC43, SLC43 and more
- ✅ Raw stainless or ceramic-coated catless downpipes for max flow & sound
- ✅ In-house custom ECU tuning – no CEL, optimized maps, handheld flash optional
- ✅ Faster spool, improved mid-range torque, and aggressive exhaust dynamics
- ✅ Fast shipping from California – reliable delivery for U.S. builders
Whether you're chasing C43 performance upgrades, M276 exhaust mods for the E43 or GLC43, or tuning solutions for the C400/C450, this collection delivers proven results.
Get Custom ECU Tuning
M276 V6 Biturbo Performance FAQ
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Will catless downpipes trigger a CEL?
Yes, removing primary cats usually causes a check engine light due to O2 sensor readings. Our in-house ECU tuning codes it out completely while optimizing boost, timing, and fuel—keeping the dash clean.
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Is this setup daily-drivable?
Yes—designed for street use. With proper tuning, drivability stays factory-like (no rough idle or limp mode), while adding noticeable power and a refined, aggressive sound.
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What kind of power gains?
Downpipes alone: +10–20 hp/tq from better flow. Paired with our Stage 2 tune: +60–100 hp and +80–120 lb-ft typical (real-world dyno reports show 430–500+ hp on pump gas/E85, depending on fuel/octane).
Need guidance on the best combo or bundle (downpipes + tune)? Message us—we're Mercedes specialists and reply fast with tailored advice for your goals.
