Just re-reading some posts about the 2.5L again - the K04 which comes on the 2.3 and as shown above is not recommended as it overboosts the 2.5 at low rpm.
A GT2871R however would work and would spool up quick enough. The GT3071R would get better peak boost at higher rpm.
This is the Aliexpress item above with the downpipe attached. Comparing to the STT500 images with the downpipe, it looks like it routes roughly similar.
Lukeyson