B58 5" Catless Downpipes - M240i/M340i/M440i/540i/740i

5" Catless Downpipes – B58 Engine | BMW M240i / M340i / M440i / 540i / 740i (2016+)

Maximize the performance of your B58-powered BMW with our 5-Inch Catless Downpipes—engineered for serious power and aggressive sound. With one of the largest downpipe diameters on the market, this upgrade eliminates factory flow restrictions, reduces turbo lag, and delivers a deeper, louder exhaust note that completely transforms your driving experience.

Key Features:

• 🔥 Massive 5-Inch Diameter
  Engineered for high-boost builds, the oversized design minimizes backpressure and maximizes flow for peak performance.

• ⚡ Catless = Maximum Power
  Removes factory catalytic converters for significantly increased horsepower, torque, and faster turbo spool. Ideal for tuned setups.

• 🏁 Aggressive Sound Enhancement
  Unleashes the full acoustic potential of the B58—expect louder, deeper tones with pronounced turbo whistle and burbles.

• ⚙️ Perfect Fitment
  Direct bolt-on design—compatible with OEM or aftermarket midpipes and cat-backs. No cutting or welding required.

• 🛠️ Durable T304 Stainless Steel
  Built to last under extreme heat and pressure. TIG-welded with mandrel bends and CNC-machined flanges for optimal flow and strength.

• 💻 ECU Tune Required
  To avoid CEL and fully realize gains, a Stage 2 ECU tune is strongly recommended after installation.

Vehicle Compatibility:

• BMW M240i (F22/G42) – 2017+ / 2022+

• BMW M340i (G20/G21) – 2019+

• BMW M440i (G22/G23/G26) – 2021+

• BMW 540i (G30) – 2019+

• BMW 740i (G11/G12 LCI) – 2019+

• Compatible with B58 Gen 1 & Gen 2 engines
  (Please verify year & emissions setup for proper fitment)

Note: Intended for off-road and race use only. Not CARB compliant. Check local laws before installation.