hi guys, newbie here, back in the mopar saddle after a 20 yr leave, last mo i picked up an 06 slt qc, big horn 4.7, with 27k on it, so far i love it! my only issue is mpg in town, 10.5-11, but i have been searching on here alot and have picked up some really good tips! my question is, is there any difference between the mag and the ho? if so, what are they? thanks.