The Toyota GR Yaris receives a Milltek non resonated OPF back exhaust upgrade, transforming both the sound and character of ...
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BMW G82 M4 engine note OPF delete full boost action
The BMW G82 M4 fitted with an Akrapovic Race exhaust, OPF delete, and cats delete delivers a far more aggressive twin turbo engine note under full throttle. This video captures acceleration runs and ...
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