Description
Palenon Performance 5-Inch Catless Downpipe for Gen3 BMW B58 Engines
For M340i / M440i / 540i / 740i / X3 / X5 / X6 / X7 | Gen3 B58 3.0L Turbocharged Inline-6
Unlock the true performance potential of your Gen3 B58-powered BMW with the Palenon Performance 5-Inch Catless Downpipe. Precision-engineered for the latest generation of BMW’s turbocharged inline-six engine, this downpipe is designed to significantly improve exhaust flow, reduce backpressure, and enhance turbo response—all while delivering an aggressive exhaust note and measurable power gains.
Constructed from high-grade stainless steel, this downpipe features a full TIG-welded structure, back-purged welds for durability, and a stainless-steel flex joint with inner liner for long-lasting strength. The large 5-inch internal diameter transitions to a 6-inch outer diameter at the flange, maximizing flow immediately after the turbo for optimal performance.
This downpipe is fully compatible with both OEM and aftermarket exhaust systems and installs easily on both left-hand and right-hand drive vehicles. With tuning, users can expect gains of over 35 horsepower and improved throttle response.
Note: Installing a catless downpipe will trigger a check engine light (CEL) due to the removal of the factory catalytic converter. Palenon offers an optional CEL Delete Kit featuring O2 sensor spacers to eliminate the CEL without a tune.
Key Features
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5-inch inner diameter and 6-inch outer diameter at the turbo flange for maximum exhaust flow
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Over 35 horsepower and torque gains with proper tuning
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TIG-welded and back-purged for structural integrity and thermal durability
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Built-in stainless-steel flex section with inner liner for improved longevity
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Faster turbo spool and enhanced throttle response
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Deep, aggressive exhaust tone under acceleration
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Compatible with OEM and aftermarket exhaust systems
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Fits left-hand and right-hand drive models
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Lifetime warranty included
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U.S. market price guaranteed
Why Choose Palenon Performance
Palenon Performance is committed to delivering premium-quality exhaust solutions using advanced fabrication techniques, racing-grade materials, and a customer-first mindset. Our downpipes are developed to meet the needs of high-performance applications while maintaining excellent fitment and longevity. Every downpipe is carefully crafted to ensure a perfect balance between performance, sound, and durability.
Vehicle Fitment – Gen3 B58 (2023–2025+)
BMW 3 Series
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2025+ M340i / M340i xDrive (G20/G21 LCI)
BMW 4 Series
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2025+ M440i / M440i xDrive (G22/G23/G26 LCI)
BMW 5 Series
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2025+ 540i xDrive / 550e xDrive (G60/G61)
BMW 7 Series
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2025+ 735i / 740i / 740i xDrive / 750e xDrive / M760e xDrive (G70)
BMW X Series
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2025+ X3 M50 (G45)
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2023+ X5 40i / 40i xDrive / 50e xDrive (G05 LCI)
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2023+ X6 40i xDrive (G06 LCI)
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2023+ X7 40i xDrive (G07 LCI)
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2023+ XM 50e (G09)
