If space isnt a issue gt42r or 45r would be great for a single turbo application. Plenty of street driven honda's, supras ect have using the 42r and have made reallllly good power. The bullseye power turbos seem to be really proven as well as alot of race teams have ditched the 42r/45r this year and went with a turbo from them instead. Say they make more power so.. if this is just a general question i hope this helps.