MAD B58 V2 4.5" Catless Downpipe w/ Bracket
Pipe size 4.5 inch
Catalyst Catless
Application B58 BMW / Supra
Build data

Specs that matter for this part

Hardware

Flow-focused exhaust path

Large-diameter tubing, smooth bends, and a flex section reduce restriction versus the factory exhaust path.

Validation

Catalyst configuration

Catless setup. Review local emissions requirements and product notes before street use.

Requirement

Direct bolt-on hardware

Designed to retain OEM-style fitment without cutting or welding on supported applications.

Downpipes can affect emissions readiness, sound level, and calibration needs. Review the product description before ordering.

Upgrade your BMW B58 engine with this high-quality 4.5-inch catless downpipe made from 304 stainless steel. It eliminates the restrictive catalytic converter for maximum exhaust flow and improved turbo spool, delivering up to 30 HP increase and a more aggressive exhaust note. The downpipe features smooth bends, a flex section for durability, and a direct bolt-on installation that fits BMW M240i, M340i, 440i, 540i, 740i, X3 M40, X4 M40, X5 40i, X7 40i, Z4 M40i and Toyota Supra models

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