Cobra Sport 3" Primary De-Cat Downpipe Performance Exhaust - BMW M4 (F82) Coupe (2014-19) M135i the stock inlet tube is

the stock inlet tube is made from cast aluminium which ends up with a rough internal surface

as well as improved the end tank design to remove any OEM bottlenecks

Additional 60-70 hp on a stock vehicle - Manual Car (Automatic cars make 40-50 hp due to the limitations of the gearbox)

diesel Gases – methane

Cobra Sport 3" Primary De-Cat Downpipe Performance Exhaust - BMW M4 (F82) Coupe (2014-19) M135i the stock inlet tube isCobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality. The Cobra Sport catless turbo downpipes produce a deeper exhaust note and allow the turbos to spool quicker for sharper throttle response and power delivery. Matched with a re map, this part allows for significant power improvements. This