Pre Order MAD BMW B58 2025+ Gen 3 M340 M440 Fat Boy 5.0" Downpipe Catless strut brace Product comes in 3 separate

Product comes in 3 separate versions: Front Set (2pc)

optimizing airflow and resulting in an exhilarating driving experience

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  Our pumps were developed in a partnership with NHP taking advantage of resources offered by both companies to produce the highest quality and highest flowing high pressure pump upgrade ever for the N55 engine

Chassis and Engine

Pre Order MAD BMW B58 2025+ Gen 3 M340 M440 Fat Boy 5.0" Downpipe Catless strut brace Product comes in 3 separateETA August 2026 Upgrade your 2025+ BMW M340 M440 with the MAD BMW B58 Gen 3 "Fat Boy" 5. 0" Catless Downpipethe ultimate performance upgrade designed to unleash the full potential of your engine. Crafted from premium quality 304 stainless steel, this larger diameter 5. 0 inch downpipe offers superior airflow, delivering enhanced horsepower, quicker turbo response, and noticeable torque gains. The increased diameter of the "Fat Boy" downpipe sets it