I bought a few Holley rebuilt carberators. One never ran right. I brought it back to exchange it and the 2nd one they got for me looked like it was put together with whatever they could find on the floor. Every screw that holds it together was different, some of the ports looked like they were home made, some of them were loose, one of them was even bent shut. I told them to order another one because I wasnt taking it. That one was OK. I have another one that worked almost perfectly without having to do anything with it. None of them were thermoquads tho. I dont think Id get one if it didnt come with warrenty or it wasnt returnable.