Description
Transform your BMW X3M or X4M with these S58 Race Downpipes, engineered to unlock the true sound and performance of your twin-turbo inline-6. By eliminating the restrictive factory catalytic converters, these downpipes deliver:
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Faster turbo spool and sharper throttle response
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Aggressive exhaust tone that brings out the raw S58 sound
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Proven dyno gains – up to +60whp and +100wtq with proper tuning
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Optimized exhaust flow to support higher boost and track-level performance
Built from 304-grade stainless steel, these downpipes feature mandrel-bent tubing and CNC-machined flanges for a precision fit. Each unit is hand TIG-welded for strength, consistency, and long-term durability under extreme conditions.
Designed for both RHD and LHD models, they bolt directly to OEM and most aftermarket exhaust systems with no modifications required.
Why Choose These Downpipes?
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Best sound upgrade for the S58 – deeper, more aggressive, and turbo spool you can hear
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Track-proven performance – supports big power with tuning
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Durable build – stainless steel, TIG-welded, corrosion resistant
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Direct bolt-on – installs using factory mounting points
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Engineered for reliability – CAD/CAM-designed CNC flanges for leak-free sealing
Technical Specs
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Material: 304-grade stainless steel
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Construction: Mandrel-bent tubing, smooth radius transitions
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Flanges: CAD/CAM-designed CNC-machined stainless steel
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Welding: Hand TIG-welded for strength and precision
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Performance: Supports up to +60whp / +100wtq with tuning
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Compatibility: Direct fit with OEM and most aftermarket exhausts
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Configuration: Race setup (catalytic converters removed)
Vehicle Fitment
BMW X3M (F97)
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2019–2026 (S58 engine)
BMW X4M (F98)
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2019–2026 (S58 engine)
Important Note
These race downpipes are intended for off-road and track use only. They are not legal for use on public roads and may not comply with emissions regulations. Please check local laws before purchase or installation.
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