BMW B46 B48 Downpipe OPF and Non OPF Tuning Guide PSR Parts SPDZ1 Racing Downpipes for BMW B46 Models (2016 2021) BMW B46 B48 Downpipe OPF and Non OPF Tuning Guide PSR Parts Downpipe BMW X1 16D F48 LCI B37 Evolution Racewerks 2016 UP BMW B46 Engine Turbo Competition Series 4. SPDZ1 B46 Stainless Steel Downpipe Upgrade Experience enhanced performance with the SPDZ1 High Performance Downpipe Upgrade, designed specifically for BMW B46 powered models. This premium downpipe is engineered for enthusiasts who value both reliability and efficiency, ensuring optimal exhaust flow and a refined sound. Key Features: CNC Crafted for Direct Fitment Designed using advanced technology for a seamless installation with factory components. Mandrel Bent T304 Stainless Steel Construction Offers exceptional durability and resistance to corrosion, ensuring long lasting performance. Optimized Internal Diameter Enhances exhaust velocity, contributing to improved turbo response and overall driving experience. Aggressive Exhaust Note Provides a deeper sound profile during acceleration, enhancing the auditory pleasure of your driving. Dyno Tested Performance Gains Designed to maximize power potential when paired with tuning and supporting modifications. How to use Ideal for: This downpipe is ideal for BMW enthusiasts looking to upgrade their vehicle's exhaust system. It is compatible with various B46 engine models and can be installed with minimal modifications, allowing for a straightforward enhancement of your vehicle's performance. Details: Engine Compatibility: BMW B46 2. 0L Turbocharged I4 Chassis: G20 BMW 320i xDrive (2019+) Material: T304 Stainless Steel Configuration: Catless (Race Use Only) Install: Fully reversible; compatible with stock or aftermarket systems