SLE XL Catless Downpipes – BMW M3 / M4 F80 / F82 / F83 & M2 Competition F87 (S55)

SLE XL Catless Downpipes – BMW M3 / M4 F80 / F82 / F83 & M2 Competition F87 (S55)

The SLE XL Catless Downpipes are built for high-power S55 builds that need more flow and less restriction. Featuring oversized 3” mandrel-bent piping, these downpipes eliminate the factory catalytic converters to reduce backpressure, improve turbo spool, and increase power across the RPM range.

Designed for both street builds and serious track setups, the XL downpipes offer a raw, aggressive tone while supporting big power levels under high boost. They’re a direct bolt-on with no cutting or modification needed and work with both stock and aftermarket midpipes.

Pair with a proper Stage 2 tune to get the most out of the setup and to avoid a check engine light.

Product Features:
– Oversized “XL” 3” mandrel-bent stainless steel piping
– TIG-welded with smooth transitions for max flow
– CNC-machined flanges with OEM O2 sensor placement
– Supports higher boost and power levels
– Works with OEM or aftermarket midpipes
– Raw, aggressive sound that lets the S55 shine
– Gains of 20–25whp / 25–30wtq when tuned
– Bolt-on fit — no cutting or permanent mods needed

Fitment:
– 2015–2018 BMW M3 (F80)
– 2015–2020 BMW M4 (F82 / F83)
– 2019–2021 BMW M2 Competition (F87)

Disclaimer: For OFF-ROAD OR RACING USE ONLY. Not legal for use on public roads in vehicles subject to emissions regulations. A Stage 2 ECU tune is required to prevent a CEL.