ON EPISODE #25: "Smoke gets in your eyes: demystifying automotive exhaust systems."AutoTalk Producer Phil Tower joins host Al Schwinkendorf and co-host John Puhek for a bunch of hot air about the world of automotive exhaust systems. Exhaust systems are nothing like they used to be on your grandfather's car, and more importantly, they last longer than ever and there's a reason behind that as Al and John break down the evolution of automotive exhaust systems and introduce us to the world of DEF and why DEF is so important for diesel owners everywhere.

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