New Factory OEM Converter – This is the best you can get, it is a perfect fit and functions exactly as the car maker designed it to. Getting the best will cost you the most, these converters don’t come cheap.

Aftermarket Universal Fit – These work great for Pre-ODBII vehicles (Prior to 1996). If you get one to function in your OBDII vehicle and not trigger a check engine light, you may want to buy a lottery ticket!

Aftermarket Direct Fit – We could get very technical here as to why these converters are legal to use and are cheap, but let’s sum it up real easy for you. New OEM converters are expensive because they contain precious metals. They are called PGM, Platinum metals group; these are Platinum, Rhodium, Palladium, and Cerium.

Most New OEM converters contain $350 to $750 dollars of these metals, depending on market value, and that is just the cost of the PGM, they still have to manufacture the converter! How can an aftermarket company make a converter that would need to have that amount of PGM in it, but then sell it for less than the cost of the required metals?

They can’t! The direct fit converter you are buying has a few dirty secrets and we are going to tell you what they are.

The rules the EPA created in reference to manufacturing an aftermarket converter are from 1988. Back then almost all aftermarket converters sold were universal fit, and that worked for the most part. In 1996 the EPA mandated OBDII in vehicles. OBDII rules specify that the vehicle ECU must have the ability to detect if the converter is operating within the original specs so that the vehicle emissions are compliant with the rules at the time the vehicle was manufactured.

The rules for emissions have gotten more restrictive as years have passed since 1988 to say the least. Ultimately the EPA requires an aftermarket converter to finish burning at least 70% of the un-burnt fuel from your engine. While this was fine in 1988, we see in our lab converters routinely converting over 90% of un-burnt fuel. So while an aftermarket converter maybe legal to sell, it does not have to meet the same requirements as the new converter.

Those details don’t even get into the fact that the engineering in a vehicle in 1988 was nothing compared to today’s technology! When a manufacturer makes a vehicle today, they need to get every detail perfect to extract the best MPG from the drive train. This means that everything from the air filter, engine, transmission, and exhaust are designed and tested as a unit. Placing an aftermarket converter in the mix just won’t match up like a factory converter would!

Certified used - This is the best of everything. You will get the fit and function of a new OEM converter, but the cost will be significantly less then new.