It's a Garett T-3 based I believe. TE designates a cast in inlet bell and is usually bigger than stock. TA is a stock compressor housing bored for whatever wheel is in it with a removable inlet bell. TA usually refers to the 87 style turbos but the stock 84 would be considered a TA. If you're looking to order a bigger one, you can send yours off and have whatever wheels you want. You're not limited to a 33, you can have from stock to whatever fits. I believe a TA62 is as big as you can go in the hotair housing and around a 64 is the biggest in an intercooled housing.