I have one that I used to use to pass smog, but my state doesn't require smog anymore on '95 and older vehicles so I removed it a few years ago and it's sitting in the corner of the garage along with the black hoses and diverter valve that comes off the back of the pump. I think I used a piece of high temp silicone hose to connect it to the cats. I don't run a smog pump anymore either, and have a mechanical crankcase evac pump in it's place.