Carli Suspension AS-FPAP-17-45-DRIVER Progressive Add-A-Pack Driver Side Leaf Spring - 4.5" Lift for 2017-2023 Ford F250 4x4

The Carli Suspension AS-FPAP-17-45-DRIVER is a driver side progressive Add-A-Pack rear leaf spring designed specifically for 2017-2023 Ford F250 4x4 trucks equipped with 4.5" or 5.5" front lift kits. This individual driver side spring is part of Carli's proprietary design, manufactured in the USA by Deaver Leaf Spring.

How It Works:

This progressive Add-A-Pack replaces the harsh factory lower overload spring (the 1" thick leaf that doesn't follow the contour of the rest of the pack) with a smooth, progressive six-leaf mini pack. By eliminating this factory "spring wall" and replacing it with thinner gauge progressive leaves, the Add-A-Pack maintains OEM load capacity while dramatically improving ride quality and traction.

Key Features:

• Manufactured in the USA by Deaver Leaf Spring for Carli Suspension
• Six-leaf progressive design replaces harsh factory overload spring
• Maintains factory load capacity while improving ride quality
• Designed for use with 4.5" and 5.5" front lift systems
• Includes 2" lift block, bump stop drops, U-bolts, and hardware
• Provides slightly rear-high stance when paired with Carli lift kits
• Smoother spring engagement and disengagement for better traction
• Eliminates harsh rebound from factory overload springs
• Driver side (left side) individual spring

Important Application Notes:

This Add-A-Pack is recommended for F250 models. For F350 trucks, the factory main spring pack is significantly stiffer and may not compress enough to benefit from the Add-A-Pack design. F350 owners should consider Carli's Full Progressive Replacement Leaf Spring Packs for optimal ride quality. This spring is intended to work with existing 4.5"-5.5" front end lift to create a level or slightly rear-high stance.

What's Included:

• Driver side progressive Add-A-Pack leaf spring assembly
• 2" lift block
• Bump stop drop bracket
• U-bolts and installation hardware