Description
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Unlock the full potential of your 2018+ BMW X3 M40i or X4 M40i with our high-performance B58 Downpipe. Designed by German Car Accessories under our GCA Performance line, this premium exhaust upgrade is engineered to improve exhaust flow, reduce turbocharger restrictions, and maximize the performance capabilities of BMW's renowned B58 turbocharged engine.
Constructed from high-quality T304 stainless steel, this downpipe is built to withstand extreme temperatures and demanding driving conditions while delivering exceptional durability. The optimized design reduces exhaust backpressure, allowing the turbocharger to spool faster and operate more efficiently. The result is improved throttle response, stronger acceleration, increased horsepower and torque, and a more aggressive exhaust note.
Specifically designed for the G01 BMW X3 M40i and G02 BMW X4 M40i, this direct-fit downpipe ensures excellent fitment and straightforward installation while remaining fully reversible if you ever choose to return the vehicle to its factory setup.
Why Choose Our BMW B58 Downpipe?
- Increases horsepower and torque potential
- Improves turbocharger efficiency and spool time
- Enhances throttle response and acceleration
- Promotes smoother exhaust flow
- Produces a deeper, more aggressive exhaust sound
- Premium T304 stainless steel construction
- Precision TIG-welded for durability and fitment
- Fully reversible modification
We Stand Behind Our Products
All items from German Car Accessories include a 1-Year Warranty.
Specifications
- Fits: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 BMW G01 X3 M40i & G02 X4 M40i
- Engine Compatibility: 3.0L Turbocharged B58 Inline-6 Engine
- Material: High Quality T304 Stainless Steel
- Precision TIG Welds for Maximum Strength and Durability
- Direct Bolt-On Design
- Optimized for Improved Exhaust Flow
- Includes All Necessary Mounting Hardware
- 100% Reversible, allowing return to stock at any time
