Take your BMW G80 M3, G82 M4, or G87 M2 to the next level with the Nebula Modular S58 Catless Downpipes. Factory downpipes are notorious for restricting exhaust flow, muffling the legendary exhaust note, and increasing turbo lag.
The Nebula Modular downpipes completely remove these bottlenecks, providing a high-flow, smooth-radius architecture that delivers sharper throttle response, faster turbo spooling, and an aggressive, raw motorsport growl.
Key Features
Premium Mesh Heat Shielding: Covered in a high-grade, dimpled silver metal heat jacket to trap exhaust temperature, keeping your engine bay cooler and protecting vital components from heat degradation.
Integrated Flex Sections: Features heavy-duty, interwoven stainless steel flex pipes to absorb engine movement and vibrations, preventing welds from cracking under high stress.
Maximum Exhaust Flow: Mandrel-bent 304 stainless steel piping optimizes flow dynamics, eliminating backpressure to unlock up to 50+ HP and 60+ TQ when paired with a proper stage 2 tune!
Precision CNC Flanges & TIG Welds: Crafted with precise CNC-machined V-band connections and heavy-duty flanges for a perfect, leak-free bolt-on fitment using OEM hardware.
O2 Sensor Bungs Included: Pre-welded threaded ports match original placement for seamless sensor re-installation.
Vehicle Fitment:
Perfectly tailored for BMW models equipped with the twin-turbo 3.0L S58 engine:
BMW M3 Sedan (G80) — 2021+
BMW M3 Touring (G81) — 2022+
BMW M4 Coupe / Convertible (G82 / G83) — 2021+
BMW M2 Coupe (G87) — 2023+
Crucial Technical Notes
Tune Required: Because this is a catless high-flow racing system, removing the factory catalytic converters will trigger a Check Engine Light (CEL). A proper ECU tune or CEL deleter module is required to clear it.
Off-Road Use Only: This product is designed and intended for track/racing or off-road use only. Please check local emissions regulations before purchasing.
