Interesting... I've been trying to figure out the difference between the two besides one of them having the OEM designation. I was kinda leaning towards the OEM but had no real reasoning behind it.

 

I did some poking around on the Magnaflow website and came up with this concerning the difference between the Standard vs the OEM designation.

WHAT IS THE DIFFERENCE BETWEEN THE STANDARD LOAD AND HM / OEM GRADE CONVERTER?

Standard Load products are manufactured with the minimum required Precious Metals to be compliant and operate in a properly tuned and operating vehicle. HM and OEM grade products are designed to function with Engine Family Number specific designs ensuring both tailpipe compliance as well as engine management system friendly operation (ensuring the “check engine” light remains off.) In addition, the extra loading will allow for proper engine management interaction and by nature provide additional emissions conversion for vehicle which may not be running at 100%.

The funny thing is, the one you bought is designated as Standard/HM on their website... And there aren't enough specs on both (on their website) to tell what other differences might be. You would think a company would at least differentiate a little better when they offered two similar products for the same vehicle.

 

Yea I figured it would have been something like that just based off the prices. But hey as long as it works, it will be a lot better than what's on it now.