Enhance your BMW's performance with the MAD BMW B58 Gen 3 Catless Downpipe, specifically engineered for the 2025+ BMW M340. Crafted from premium 304 stainless steel, this 4.5-inch downpipe guarantees optimal exhaust flow, durability, and resistance to corrosion, providing the absolute best quality and longevity.

By eliminating restrictive factory catalytic converters, the MAD catless downpipe significantly boosts horsepower, sharpens throttle response, and reduces turbo lag, delivering an exhilarating driving experience. Precision-engineered welds and exact fitment ensure a seamless, bolt-on installation without hassles or modifications.

Enjoy an aggressive, sporty exhaust note and unparalleled performance gains. The MAD downpipe is a must-have upgrade for both daily-driven enthusiasts and track-focused drivers seeking to unlock their BMW’s full potential.

Features:

• High-grade 304 stainless steel for unmatched quality and durability

• 4.5-inch piping diameter for improved exhaust flow and performance

• Significant boost in horsepower and torque

• Enhanced throttle response and reduced turbo lag

• Aggressive, deep, and sporty exhaust tone

• Easy direct bolt-on installation

Upgrade to MAD quality—experience superior performance, unmatched reliability, and thrilling sound for your 2025+ BMW M340.

Current ETA August 28th 2025