need header parts

I have a used set of Summit 9001 headers that have been in storage for over a year, and it is time to FINALLY install them. I was on the Summit website picking up the drivers window switch started looking at the headers. Too many choices and I am a bit confused.....

I have the Dynomax 2.5" exhaust pipes. I need the correct reducers WITH O2 bungs, gasket and bolts. Anyone know the part #'s to get? I would prefer reducer that fit over the exhaust pipes so I can remove, if needed.

I just grabbed a set of bungs off ebay and had them welded to my collectors. Cost less than 10 bucks.

2.5 Dyno pipes with no Cats fit like a glove on Afterburner headers.