AWE Tuning Track Edition Cat-back Exhaust 2015-2017 Volkswagen GTI (Mk7)Four Generations Strong. Producing an exhaust system for Volkswagens 7th generation GTI was no easy feat. Luckily AWE Tuning already have four generations of GTI under their belts. Merging decades of experience with hundreds of hours of prototyping, engineering, dyno testing and daily usage evaluation has output an exhaust system that is the ultimate compliment to GTI lineage. With options to go around, this is AWE Tunings finest GTI exhaust to date.