the R/T exhaust end it bigger than the stock midpipe....... help? what should I do?

clamp it real good

Reducers FTMFW

i got it

one of these is the factory part # to adapt your r/t rear section to your stock pipe

5278624AH/82208484

Yep . JUst in case you, or anyone else wanted to know why it didnt work, its because the base/SRT-4 midpipes taper all the way down to 1 7/8" while the R/T only tapers to 2 1/8".