have any of you guys put in the cummins RV injectors in yours 2005s yet... . if so what kinda gains did ya get? im thinkin about changin over to them but want need to know which ones and where to get them,... right not im straight piped and am about to do a new intake out of from a big K&N and some 4"exhaust pipe i got from kenworth today. well thanx in advance guys... .