Introduction The BMW B58 engine is powerful.However, the stock exhaust limits performance.Upgrading with a B58 downpipe improves airflow and boost. Moreover, exhaust sound becomes more aggressive.For maximum performance, many enthusiasts choose a b58 catless downpipe.Therefore, this guide explains benefits, types, installation process, and costs. What Is a B58 Downpipe? A B58 downpipe connects the turbo to the exhaust system.It replaces […]