Anyone know much about these and putting them on cars, seen them talked abut in magazines a little recently. Was in Disneyland Paris recently and they have a stunt show by sponsored by Opel!!!
A load of Corsas ragging it around with twin motorbike exhausts and they sounded awesome, am about 90% certain it was real and not sound effects cos it roared past me and ...well im reasonably certain!!!
How much they cost?? any negatives???
Thanks
