im still learning about cats myself, first of all as the guys that really know it all depends on your relationship with your yard, that being said the first ones i sold if i remember correctly was about 60 for the pair and the last ones which was a few weeks ago i believe was right at 90 a pair, (my relationship has grown alot). the sad conclusion i have come to with fords is you get twice as many and twice the work but half the price of gm and imports. just my experiences so far