[C's 94 InTeGrA]

Well i am i nthe buying mood again so i wen to the perforamce shop down by my house and they got a Random Tech. high flow cat at there shop for my car and he said he would sell it to me for like $140 but he usually would charge $160-$170 for it. are they good cats? i looked at it and all and it looks pretty open inside. would it do anygood to get it or should i just go and buy springs cause there about the same price as the cat.