Designed for performance these slip-ons have a nice deep sound. The E-approval of the dual mufflers makes them street legal all over the European community. Slip-ons feature removable dB Killers and come complete with a collector tube with built-in catalytic converter, easy to install on the stock header pipes. Kits also include a carbon fiber heat guard. A Racing collector tube without cat is available separately. The optional ECU Tuning Module is a must when installing the Racing collector. Removal of the dB Killers and/or installation of the optional racing collector voids the E-approval.