I just got this TC less than a month ago from another member (ls1.com) with the assumption that it was 2.5STR (that is what he was told it was). After Yank finally wrote me back(4weeks after I emailed them and like 6 days after I already purchased it) I was told it was only 1.61 STR. I am looking for something with a higher STR so it will be tighter and feel more like stock rather than a all out race car. I am still daily driving my car. I paid $450 shipped to my door. And am looking to sell for $450 shipped just like I paid. or possible trade for another TC with higher STR. This is a LS1 TC.