Milltek | Particulate Filter-Back Exhaust with GT-115 | Toyota GR Yaris | G16E-GTS | 2021-2024Milltek Particulate Filter Back Resonated Exhaust with GT 115 Since 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 of the particulate filter and significantly improve the sound aesthetic of the exhaust system Available as a resonated (EC Approved) or non