Has anyone had any experience with a Catco Y-pipe assembly complete with cats for a 1994 D1 ? I need a new one and the price on the Catco is $395.00. It says it's stainless steel pipe but I don't know if it's the same quality as orginal. I was getting a rattle on the right side and removed the Y-pipe to give the cats a shake. No rattle, but I did get a small amount of the converter material to fall out of the right side cat. Need oxygen sensors too. I think I'm gonna go with sensors from www.oxygensensors.com . My originals say Lucas but look like they are NTK . Is this correct?