I just want to first say that i just did the egr and dpf deletes and installed a smarty s-67 upgraded to the ME. My God is there a night and day difference in everything. Ok, the problem is i know i'm gonna need a clutch eventually and want to start shopping. I'm am looking so far at the Valair single and dual disc and the Southbend dual disc. I wanna hear some pro's and cons and such. I don't plan on sled pulling. Just trailers, drag racing ocasionally and this is a daily driver. Injectors are probably the only other upgrade eventually as far as horsepower.