Top Speed Pro 1 BMW G80 M3/G82 M4 Catback Redesign!

Updated new design for the Top Speed Pro 1 BMW G80 M3/G82 M4 Catback Exhaust with Dual Electronic Valves! Added 2 more resonators and we re-routed piping - this improved the sound bigtime! Thank you to Jesse ‪@hellabadgarage‬ for the videos!

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