Why do they sell it then lol on ktec and internet etc....
Placebo^^
If you have cams, matched inlets etc then maybe you could consider it, otherwise for everybody else the standard throttle body is not a bottleneck. The stock inlet plenum is far more restrictive hence why things like the RS2 were built. Spend the money elsewhere.
With the standard inlets and an enlarged body you're simply moving the throttle position higher for the sense of more speed.
/thread
I have one fitted on my phase 1, I have to say it felt better, I switched back for a few days and it felt worse. So put it back on. The car has matched inlets, de-cat with non standard system and has been mapped. It would of course be interesting to see rolling road results back to back which obviously is the ONLY way to tell ! ! !
edited to say not from Ktec !
If it had been mapped for larger then of course it would run poorer on the smaller one.
Even then, if the standard TB flowed less than the RS2/lower inlet could cope with, then surely the RS2 for your many many ££££ would come with an enlarged TB.
=> Standard TB probably still not a bottleneck even with an RS2 & associated cams, exhaust etc. that people would also be running?