Oh man, I am really sorry. You are the second poster in this same thread I have missed questions from. I can only blame my exhaust hype and pre-install anxiety due to me missing that. Usually I answer everyone, I apologize for my ignorance! I will go from the header on back to the muffler in that order. Let me know if you have any other questions.
My old System:
Weapon R header (2.0" collector)
Magnaflow high-flow cat (2.0" in and 2.5" out)
Magnaflow resonator (18" length of the muffler or can section, longer overall length and 4 inches around)
Magnaflow muffler 6" round body (with 4" tip)
My new system:
DNA Motoring header (2.5" collector)
Magnaflow high-flow cat (2.5" in and 2.5" out)
Magnaflow resonator (22" length of the muffler section, 28" overall length and 4 inches around)
Magnaflow 5" by 9" oval body muffler (with 2.5" tip)
Once again, many apologies for ignoring those who I ignored. I did not mean to!