[JET]

The main part of the turbulators is not the fin inside the core like is show in Brandon's pic, but the little tabs that should be inside there. The Ebay core I had only had small holes stamped in the fins, which was basically useless. Like was said earlier, I could see right through it. The Garrett core I have has small panels bent out into the airflow from the fins, to actually cause some turbulance. The core I had was a TurboXS, so avoid that.