Where is a source for a 3" x 2.5" header collector that is made of stainless steel? I bought one from Summit and it came with stainless steel nuts and bolts, but the collector was very magnetic. I know that some SS is slightly magnetic, but this was really sticky so I sent it back. I don't want to be concerned about this part rusting later on.

I am sure there are a lot of sources but you can also call Boyd at Sanderson's Header's http://www.sandersonheaders.com/

Are you talking about a reducer or a collector?

I am speaking of the part that goes between the header and the exhaust pipe. Kind of like a funnel. I'll check with Sanderson Headers, thank you for the contact