I just pulled the trigger on a set of 2m Fabrication headers and ordered 3id to 2.5id 304SS reducers.... $450 shipped with ebay 10% off today.
I hope these mate up to my roush catback easily with the reducers.
I plan to have my installer re-use my gaskets since my car is only at 2k miles.
I just picked up my used S550 on Saturday... Drove 250mi to buy it.
2017 GT base. 6r80, with 3.55 gear, black accent package. 1620miles, $27999.99
One warning...Make sure it comes with 2 key remotes. Mine only came with one and to get a second I was quoted $295+tax.