The outside of the tube measures 2"OD but pretty sure these were thier 1-7/8"(ID) headers. Would that be correct?

Just had them cermaic coated and polished, $350. Picked up today. Not sure if these go back on my Challenger or with me to Carlisle

Header tubing is usually, with most companies, measured at the OD.

How is that blue Challenger doing anyway? Miss the regular pics of it back in the day.

Every time I've put bigger primary tube headers on an engine on the engine dyno or at the races the motor made more power and the car went quicker, I don't believe you can put too big of headers on any BB Mopar V8

great deal for those headers.

Think they cost me $800 10 years ago. Looks like they are over $1000 right now. Im probably gonna drag them to Carlisle. If I can get what I paid 10 years ago I’ll flip em else I may put them back on and shelve the extrude honed exhaust manifolds I was gonna put on.

I measured the collector opening and it's 3". The TTI website says 1-7/8" are the biggest tube size with a 3" collector. Guess these are 1-7/8" then

i think most header brands go 1 7/8 with 3" collectors.
2" go 3 1/2" and larger, step headers, etc.