MILLTEK SSXBM1155 Particulate Filter-back BMW 1 Series M135i xDrive 5 Door (F40 OPF/GPF Equipped) 2019-2021 ymm_44 the thermostat opens

the thermostat opens

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Heat exchanger features all-aluminium construction with 180% increase in fin surface area and 60% increase in core volume

Stringent quality testing exceeds automotive manufacturer standards

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