The Throttle Air Bypass Valve (TAB) & Throttle Air Diverter Valve (TAD) are part of the SMOG or Emissions system. They are controled by the PCM via the TAB & TAD Vacuum Control Valves. The Mustang TAB & TAD Vacuum Control Valves are located on the rear of the passenger side (RH) Strut Tower.
LMR is a great company with great products. I recently purchased the Gibson Catback exhaust for my 2015 Mustang Ecoboost and I love it. Easy to install, great looking tips, and best of all almost half the price than competitors systems. My main reason I decided to go with Gibson was because off the reputation and because I think after searching all the exhaust systems, their exhaust system is probably the best sounding one. No raspyNess what so ever you expect from a 4 cylinder exhaust system. It's a nice low, deep tone.Rafael Kaplanowski from Las Vegas NVposted last month