I used a six for a few years and upgraded to a twelve last year. There is no comparison. Larger base, wider piston and most importantly for me a longer piston makes what used to be a chore a breeze.
2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K
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2011 Flagstaff 831FKBSS
2010 F250 4X4 5.4L 3.73 LS
EQUALIZER E4 1200/12000
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