no more buses....bet that breaks your heart...lol....My cummins loves egr valves...I haven't studied the new gen motors yet, but I am not liking what I am hearing...and all that slobbers running down the sides of those beautiful chrome stacks can't be good either...rusty colored water vapor my butt...international harvestor dropped cummins engine from their line because they couldn't agree on the motor, so IH is making their own motors now, and cummins is making a deal with Pete/KW...and CAT is out altogether...so much for good running truck engines...Not sure what Detroit is doing...since they are all foreign owned now..