The Starter System, 2.0 & ***2.5 System use clevisis or stem top w/ factory towers. They are for mild off road w/ great street ride.
Also the 2.5 system comes w/ Carli's aftermarket towers (the stem top I noted above is for guys who have the Starter or 2.0 system that want to upgrade to the King's w/o spending money on new towers). All other systems (2.65 & 3.0) come w/ Carli's towers. These systems are for off road speeds & of course great on road ride/handling.
Carli does alot of R&D in every possible driving environment before they release to the public (knowing such things like stock towers will not hold up to abuse to off road speed type terrian along w/ other flaws of stock components). That's why when a customer is unsure what system to get. Carli will point them in the right direction for thier truck use.
Dodge Ram Suspension Systems and Components by Carli Suspension
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2009 SLT Quad 4x4 CTD G56
Some Carli Suspension loving coming soon!