BMW M4 F82 agressive exhaust sound by Secretflow

BMW M4 Competition F82
This M4 already change downpipe and equal length midpipe by Secretflow. Can hear the sound more aggressive after add on our Secretflow Axleback Exhaust valvetronic.
Any enquiries can whatsapps us on number below
www.wasap.my/+6... - Ah Bin
www.wasap.my/+6... - Hakim
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