I made my mini a lot more silent and only spent 30 euro.
Fitted small sheets ( 15x10 cm) under the bonnet, on the parcel shelf,boot floor and Passenger Seat back. Used the cheapest panel deadning i could find (the black asfalt kinda stuff)
Fitted sound absorbing material ( 1m x 20 cm) behind the dash, facing the engine
30x30 in the boot
2x a 20x 30 piece in the companion bins.
The car was so much more civil inside!
I ve also put sticky aluminium sheet over all the open holes in the firewall.
Edited by Dusky, 06 February 2018 - 11:18 PM.