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The tapered profile optimizes pinion angle geometry for improved driveline performance
minimizing sagging while maintaining a smooth and controlled ride
750 pound load rating
Polished finish enhances factory styling
2011-2016 Superduty Progressive Add-A-Pack Kit (CS-FPAP-11) charge-air-pipe The tapered profile optimizes pinionDescription Designed and built in conjunction with Deaver Spring MFG, these Carli Add A Pack Leaf Springs eliminate the use of your lower overload leaf, giving you thinner gauge leaves that improve mobility of the springs, traction, predictability, and ride quality off road and when you're hauling without compromising load capacity. Part Number: CS FPAP 11 Features Compatible with 3. 5" axle tube Progressive design addresses the harsh rebound of the
