SLN BMW M340i 440i 540i 640i 740i and 840i 4.5” Ceramic Coated Sports Cat Downpipe for B58 OPF engines only.
 
This SLN ceramic coated downpipe has been designed for the legendary Gen 2 B58 platform. SLN downpipes are made from SS304 aircraft-grade stainless steel. This downpipe will provide noticeable power gains and a much more aggressive exhaust note. You will also notice faster turbo spool and increased turbo noises vs the standard downpipe. The ceramic coating will also reduce engine bay temperatures aiding in keeping down IAT
 
This downpipe will fit the following models with OPF/PPF only:
BMW G42 M240i xDrive 374PS 2021 OPF Model
BMW G20/21 M340i 3.0L 285KW/374PS 2019 OPF Model
BMW G22 440i 3.0L 285KW/387PS 2019 OPF Model
BMW G30/31 540i 3.0L 250KW/340PS 2018 OPF Model
BMW G32 640i 3.0L 250KW/340PS 2018 OPF Model
BMW G11/12 740i 3.0L 240KW/326PS 2019 OPF Model
BMW G14/15/16 840i 3.0L 250KW/340PS 2019 OPF Model
BMW Z4 G29 M40i 3.0L 250KW/340PS 2019 OPF Model
Toyota Supra MK5 A90 & A91 GR 3.0L 250KW/340PS 2019 OPF Model
 
The use of de-cats, sports cats and removing OPF are for off road/motorsport use only. Using these parts would inhibit your vehicle from passing a MOT test.
 
Only EC type-approved components are legal and fit for road use.