BMW M4 (F82) Coupe 3" Secondary De-Cat Bypass Performance Exhaust a4b8.5 the SLJ supplied is not

the SLJ supplied is not required for fitment

These performance exhausts are made in 2

Powerflex have the answer

Nitrous Blue

2mm pipework and fits from the Gasoline Particulate Filter section backwards (GPF-back) replacing the centre and rear sections

BMW M4 (F82) Coupe 3" Secondary De-Cat Bypass Performance Exhaust a4b8.5 the SLJ supplied is notFits to Cobra Sport Valved Cat Back only (BM103) Pre PPF models only. (Requires 2 x BMW gasket part number 18307851168 not included). Cobra 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. This BMW M4 performance exhaust is made in 3" 76. 2mm bore pipework and replaces the secondary catalyst