18+ s550

I have a 19 GT PP2 and can get a Mach 1 Intake manifold/TB take off. Has anyone swapped out their 18+ and if so what type of benefits did you see? Have SP headers ready for install and probably purchase a JLT/PMS to fit the 87MM TB. Will be getting PCMtec multi-tune to Run pump E85/93 (work...

Does anybody know how the exhaust tips compare size wise to stock on the 18+ GT? To me they look like they fit smaller in the diffuser. Any input?

Happy new year to everyone reading this. I have been wondering if anyone with an actual 18+ GT have ported their stock IM and what results you got? I got a ported one that I got for my 15 but since now I got a 19, was thinking about swapping it when I get my PMAS intake. Wanted to see what gains...