they stopped dynoing it and told me i need a highflow cat converter that the one on my car is all stuffed up causing the car to almost overheat when being dyno'ed?? htis possible this shop has had my car for almost 3 weeks now i think they just dont knwo what the hell there doing to my car honestly... i just wanna knwo this possible? i have a greddy turbo on it .. ?

told me i need a highflow cat converter that the one on my car is all stuffed up causing the car to almost overheat when being dyno'ed??

Yes, this has happened to myself (also greddy turbo) and others on here. Mine had signs of breaking down and didn't affect it much, but there have been others where it's clogged really bad and their car was NA. Due to high exhaust temps.
Get a highflow cat converter or midpipe with no cat if you don't have emissions testing in your area.

makes sense but just a lil worried thas all thanks! i ordered a aftermarket high flow cat ... i dont have emmissions were im at .