^ Yep, or you gotta run a DG header to get the 1.625"s ID tubing.
But, I know what the concern is. We are paying 250 to 450$ for an old Supertrapp. In my case, I have nice full working systems so I'm good.
The average guy looks for a ST exhaust, gets a pitted, bent or cracked system (in some shape, form or fashion), and many times they won't come apart to service them; Scratch that, 80% of them probably don't come apart!!!!
So, yeah, just plan on making a custom system for the greatest benefit, or just a DG or Cobra that are obnoxiously loud but let ya boot up the main jet quite a bit!!
You can buy pre-bent tubing and all the other pieces if you look deep enough....
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country