If your 2003 Toyota Tacoma has recently failed an emissions test, there is a good chance that your catalytic converter is the culprit. A catalytic converter is part of the exhaust system. It is designed to scrub the exhaust gases as they flow through the system and reduce or eliminate the most harmful pollutants found in automobile exhaust. The worst offenders are carbon dioxide, sulfur dioxide, nitrous oxide, and hydrocarbon byproducts. A catalytic converter uses heat and precious metals of the platinum family to perform a chemical reaction, mostly eliminating these pollutants. The Toyota Tacoma’s catalytic converter, like all catalytic converters, is one of the most power robbing components of your exhaust system. That is why if you have to replace your catalytic converter, you will want to get a performance DEC Tacoma catalytic converter. The more advanced design of the Toyota DEC catalytic converter means that the exhaust gases are able to flow through the system more efficiently. This reduces back pressure, which translates to a perceived increase in horsepower at the wheels. Horsepower gains of 5 BHP are not unusual with a DEC catalytic converter. Auto parts customers certainly deserve an outstanding level of service when ordering reliable auto parts from us. For all our customers, we make available a 24-hour, 7 day a week assistance desk to address your queries. If you spot a better price somewhere else, give us a call - we always beat any advertised price for auto parts.