Upgrading the exhaust with the UlterSoundBox
voids the Homologation for the whole exhaust system
Before purchasing, please check if using such system is legal on public roads in your country.
In the order remarks section, please specify the exhaust (from the list above) you want to but the UlterSoundBox upgrade
UlterSoundBox installation video
UlterSoundBox WARRANTY - 12 months