Base 10.8L L6 [2011] Base 6.0L V8 [2014-15] Base 6.7L L6 [2012-13]
XB Straight Rail
Base 6.7L L6 [2011-16]
XBA ARBOC
6.7L L6 [2015-16]
XC Lowered Rail
Base 6.7L L6 [2011-15] Base 8.9L L6 [2016]
XC Modular Rail
Base 6.7L L6 [2011-16]
XC Raised Rail
Base 6.7L L6 [2011-16]
XC Straight Rail
Base 6.7L L6 [2011-16]
WESTERN STAR
4700SB
Base 8.3L L6 [2013] Base 8.9L L6 [2014-16]
4700SF
Base 8.3L L6 [2013-14] Base 8.9L L6 [2012-16]
4800SB
Base 10.8L L6 [2014] Base 12.8L L6 [2012-16]
4800SF
Base 12.8L L6 [2013-16]
4900EX
Base -- [2010-19] Base 12.7L L6 [2011-14] Base 14.9L L6 [2016] Base 14L L6 [2015]
4900FA
Base -- [2010-15] Base 12.7L L6 [2011-15] Base 12.8L L6 [2016]
4900SA
Base -- [2011-15] Base 12.7L L6 [2011-14] Base 12.8L L6 [2016] Base 14L L6 [2015]
5700XE
Base 12.8L L6 [2016]
6900XD
Base 14.9L L6 [2015-16] Base 14L L6 [2011-13]
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