I have this installed on a 6.7 Cummins that I bought with stock fuel and injectors. It spools 300 rpms sooner. KC turbos was super quick turn around (in 24 hours) on the rebuild and excellent service as usual. I can't wait to see what it will do with bigger injectors and 12mm fuel pump.

Extremely aggressive looking wheel straight out of the box, you can clearly see the difference between the kc wheel and the borg Warner wheel. Spool up time is much lower in the rpm range and it never seems to back off. I am running it on a 7.3 powerstroke and soon to be adding to a 6.0l. No surging issues at all. Egts are much more manageable now that I get on top of the turbo quicker. I highly recommend this wheel to replace your stock or worn wheel.