Fair enough
I suppose they could also re-build your SDI injectors to standard spec and re-balance them should they ever get tired. Apparently the nozzles wear away and the spray pattern deminishes over time, 100K miles is a figure which floats around but not sure how significant it all is.
As long as your happy is all that matters, they certainly do shift with the right mods even with the standard turbo
. In all honesty I do this because mechanistry is a hobby and I get as much enjoyment from tuning the car as I do from taking it for a blast. Performance on yours will be way more than a match for most modern traffic.