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BN BMW S55 High Flow Catted Downpipe – M2 Competition / M3 / M4 (Euro5 | Inconel Shielded)
Unleash the full potential of your BMW M2 Competition, M3, or M4 with the BN S55 High Flow Catted Downpipe. Engineered for maximum performance, reliability, and euro emissions compliance, this downpipe is the ultimate upgrade for enthusiasts who demand power without compromise.
Key Features:
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✅ Euro5 200 Cell High-Flow Catalytic Converter – These catalytic converters are designed to minimize harmful emissions while preserving high performance. Engineered for maximum exhaust flow and minimal backpressure, they enhance engine sound and elevate the overall driving experience.
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✅ Premium Inconel Heat Shielding – Wrapped in high-temp inconel for superior thermal management, keeping engine bay temps down and protecting vital components.
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✅ Durable 304 Stainless Steel Construction – Mandrel-bent tubing and precision TIG welds ensure long-lasting durability and corrosion resistance.
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✅ Direct Bolt-On Fitment – Designed to fit all BMW S55-powered models including the F87 M2 Competition, F80 M3, and F82/F83 M4.
Performance Meets Practicality
The BN S55 catted downpipe strikes the perfect balance between streetability and track-ready performance. The Euro5 200 cell catalytic converter flows significantly better than the restrictive OEM unit, improving throttle response, turbo spool, and overall exhaust sound—all while keeping your car smelling clean and minimizing the risk of check engine lights.
Built to Handle Heat and Horsepower
Inconel heat shielding—often reserved for motorsport and aerospace applications—reduces radiant heat and protects nearby components from heat soak, improving consistency and longevity under aggressive driving conditions.
Why Choose BN?
Our products are built by enthusiasts, for enthusiasts. Every BN downpipe is engineered with real-world testing and quality control to ensure the best fitment, performance, and reliability.
Fitment – Compatible with the following BMW S55-equipped models:
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2019–2021 BMW M2 Competition (F87)
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2015–2018 BMW M3 (F80)
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2015–2020 BMW M4 Coupe (F82)
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2015–2020 BMW M4 Convertible (F83)
Engine Code: S55 3.0L Twin-Turbo Inline-6
Note: Not compatible with non-Competition M2 (N55 engine).
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