BMW G20 G22 M340i M440i B58 GEN 3 CATLESS DOWNPIPE

Unleash the next level of performance from your B58 Gen 3 engine with our BMW B58 2025+ M340 / M440 4.5" Catless Downpipe. Designed specifically for the latest B58 platform, this upgraded downpipe removes the restrictive factory catalytic converter to maximize exhaust flow, turbo efficiency, and power output.

Featuring a 4.5” “Fat Boy” design, it ensures superior gas velocity and faster turbo spool, resulting in sharper throttle response and a more aggressive exhaust note. Constructed from premium 304 stainless steel with CNC-machined flanges and TIG-welded joints, it delivers exceptional durability, precision fitment, and long-term reliability even under extreme heat and boost.

FITMENT:

• BMW M340i (G20 / G21) – 2025+ B58 Gen 3

• BMW M440i (G22 / G23 / G26) – 2025+ B58 Gen 3

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