Downpipe BMW G30, G31 540i, 540iX B58
€250.00€220.00
High-performance catless 4.5″ (114 mm) downpipe designed for BMW G30 and G31 5 Series models with the B58 petrol engine. Engineered to minimize exhaust restrictions, this downpipe enhances both power output and exhaust sound, delivering a more aggressive and refined driving experience.
Important: Not compatible with models equipped with GPF / OPF systems.
Compatible Vehicles
BMW 5 Series (2017–2020): G30 / G31
540i (250 kW / 340 hp) – B58
540iX (250 kW / 340 hp) – B58
If your model is not listed, please check our other products or contact us for assistance.
Technical Specifications
Constructed from high-quality SS304 stainless steel
Downpipe diameter: 4.5″ (114 mm)
Turbo flange diameter: 134 mm
Connection to stock exhaust: 80 mm
2 ports for lambda (oxygen) sensors
OEM reference part numbers:
18 32 8 631 625 / 18328631625 / 8631625
18 32 8 684 788 / 18328684788 / 8684788
18 32 8 652 180 / 18328652180 / 8652180
Designed for precise fitment, durability, and optimized performance in tuned or stock B58-powered vehicles.