Midweststroker
New member
I am running the latest set on my 6.4. I didn't do a dyno test before and after, but what I can tell you is the quality is amazing, the spool up is quick, they handle heat (and I mean fire red hot) well, and after looking/comparing the design to the 6.0 I would think they'd have to be as good or better. IMO...worth the money.