BMW X3 G01/X4 G02 S58 LCI (GPF Equipped) - OPF/GPF Bypass System with Burnt/Blue Titanium TrimsFrom late 2018, many vehicles have been manufactured with a Gasoline Otto Particulate Filter to reduce further the emissions from the vehicle. The Milltek Sport Particulate Filter Back range is designed to compensate for the sound reducing qualities from the particulate filter and significantly improve the sound aesthetic of the exhaust system. All our performance exhaust systems are designed with you in mind, and we cater to an ever expanding range