B58 5" Catless Downpipes - M240i/M340i/M440i/540i/740i
Unleash the full potential of your BMW G-Series with our premium B58 5" Catless Downpipes. Precision-engineered for perfect fitment, these high-performance downpipes are crafted from high-quality T304 stainless steel with mandrel bends for optimal flow and durability. Designed specifically for the B58 engine, these catless downpipes eliminate the restrictive factory catalytic converters, resulting in significant power gains, enhanced exhaust note, and improved throttle response.
Key Features:
• Premium T304 stainless steel construction for maximum durability
• CNC machined flanges for perfect OEM fitment
• Mandrel bent 5" tubing for optimal exhaust flow
• Significant power and torque gains (12-20 HP and 15-25 TQ at the wheels) • Enhanced exhaust note with deeper, more aggressive tone
• Improved throttle response and reduced turbo lag
• Direct bolt-on replacement for factory downpipes
• Complete installation hardware included
• 3-year manufacturer warranty
Technical Specifications:
Material: T304 stainless steel
Finish: Polished stainless steel
Fitment: BMW M240i G42, BMW M340i G20, BMW M440i G22/G23 (2019+)
Installation: Advanced - Estimated time: 2-3 hours Pipe Diameter: 5" (140mm)
Weight: 5.8 kg Package Includes: B58 catless downpipe, installation hardware
Installation Information:
Installation of this B58 catless downpipe is rated as advanced and typically takes 2-3 hours to complete. Professional installation is highly recommended due to the complexity of accessing the factory downpipe. Special tools may be required, including a lift or jack stands, socket set, and exhaust hanger removal tools. A detailed installation guide is included with your purchase, and additional installation resources can be found on our blog. The downpipe is designed as a direct replacement for your factory component, utilizing the factory mounting points for a secure fit.
Compatibility:
This B58 catless downpipe is specifically designed for: * BMW M240i G42 (2022+)
* BMW M340i G20 (2019+) * BMW M440i G22/G23 (2020+)
* All G-series vehicles with the B58 engine
Please note: Not compatible with previous generation F-chassis vehicles. This downpipe is designed specifically for G-series vehicles with the B58 engine and will not fit other BMW models.
Care Instructions:
To maintain the performance and appearance of your B58 catless downpipe, we recommend: * Allow the exhaust system to cool completely before cleaning * Periodically check mounting hardware for proper tightness * Inspect for any exhaust leaks at connection points * Clean with a mild stainless steel cleaner when necessary * Be aware that the downpipe may develop a natural patina over time
Why Choose Our Products:
At Mspec, we specialize in premium automotive enhancement products for luxury vehicles. Our B58 catless downpipe is designed and manufactured to the highest standards, ensuring perfect fitment, superior quality, and impressive performance gains for your BMW G-series vehicle. All our products undergo rigorous testing to ensure they meet the most demanding standards of quality and durability. Choosing our products guarantees not only significant performance improvements but also peace of mind thanks to their quality and reliability. Our exhaust components are crafted by experienced technicians who understand both the performance aspects and sound characteristics of BMW vehicles.