will the MAC longtubes n lethal perf fit...

[oxw01svt]

i have a anoying exhuast leak comming from my shitty FRPP shorty headers and I was wondering if the MAC longtubes 2.5 inch and Lethal performance midpipe fit up to a 3 inch american thunder flowmaster cat back? before winter somes i just want my car to run good. i dont want to get a 2.5 inch irs catback cause i will be swapping to a solid in the spring and i think it would be a waste of money to buy a irs catback and then a solid catback. any feed back would be very helpful thanks guys.