TPC Racing’s Mike Levitas and his crew are veterans when it comes to transforming rides into high-performance racers. Their experience goes as far back as the early 80s; developing turbocharger programs for cars like the Nissan 300ZX, Mazda RX7, and Lotus Esprit. This time around, the team uses their expertise to give a 2006 Porsche …

Given the twenty-plus years of experience tweaking Audis, German tuner MTM has had more than enough practice. Their newest creation is based on the Audi TT RS that rolls off the line sporting an impressive 340 horses. After all of MTM’s modifying and tuning, the number jumps to as much as 424 hp and …