The 2008+ STI GT Series STI Exhaust was designed with three things in mind; Style, Sound and Performance. The styling of the dual 3.5 inch tips on each side were to accentuate the rear valance on the STI. Giving it an aggressive look at the rear of the car but keeping a grown up attitude. 

Note- Current version can only be used with TXS SBE or as a complete TBE!