havnt yet had it tuned, iv put a new intercooler kit and this cat with centre muffler removed w/gate mod. im getting a surge tank and twin 044`s from cv performance then they will retune. im using a boost controler to keep under 12 psi untill I get a retune. as for other mods. deka injectors full plazmaman 800 kit with hot side pipe and airfilter in the inner guard. mal wood opt 3 full kit with braded lines and alloy csc and lightend flywheel. 5 icnh hurri cat on the stock system with centre muffler removed, soon to add surge tank and pumps valve springs and an atomic bottom end.