13.8X1.2 new vs 12.6X1.0 old. But the old brakes are way good enough to stop a horse trailer with 2 horses in it, you should still have trailer brakes for a load like that.
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2007 KC SE 2wd
Silver
K&N 63 Amsoil filter
Flowmaster 70 2 in 1 out
2.5" PRG level
UpRev tune
305hp/360ftlb-dyno
Armada air dam
bug shield
chrome mirrors,tail gate handle
black bull bar
70" running boards
pp5w30--wix filter
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