Pro Comp Rear Add-A-Leaf Kit - Pair - 13134



  • Add-a-Leaf kits are the perfect solution when 1.5 in. - 2.5 in. of raised height is required. This strengthens the integrity of an existing leaf spring pack, which is helpful when trying to renew the spring due to age and heavy loads.
  • Rear Add-A-Leaf Kit
  • Long
  • Boxed


Great addition

First off - This part fits 04-08 F150 - both ProComp and 4WP need to fix their database, because even the documentation of this part says so - Guys, you are probably losing some sales because of this screwup.I have an 07 F150 FX4 Supercrew with a ProComp 6 inch lift. Like others have mentioned, after the install I wasn't sure I liked the rear height. After I put the truck's rear top on it, I really didn't like it, because the weight made the rear sag.To fix this issue, I added 2 parts: This AAL, and a Fabtech 5 inch block.The 5 inch Fabtech block replaced the factory 2 inch block and the ProComp 2.5 inch block (net result is an increase of .5 inches, but using 1 block instead of stacked blocks).This AAL helped support the load, and raised the back up a little (maybe an inch to 1.5 inches).So after [$] (including parts and install), the lift looks right, with the rear raised slightly above the front (a little more like the stock rake).The ride feels fine, I don't know what other reviewers meant about a stiffer ride. This truck is actually much smooth than stock with all of the ProComp parts.

from Jacksonville, FL |
Great Ride

Added a three inch level to the front causing the California look which I hated. The add-a-leaf raised the rear back above the front giving it the factory look with more clearance. Great part.

from Kailua, HI |
Good fix for a saggy rear end

This was the perfect fix for the rear end of my truck after I put the front spacers in it, I run 33 inch tires but have more than enough room for 35 inch.

from Golden, Colorado |
Cheap and Effective!

Love the AAl. Does its job and adds some load capacity

from Lompoc,CA |
Not so great

The Good: This product takes care of the prerunner look on a 6" procomp lifted f-150. Adds a bit of room for tongue weight at max capacity. The Bad: Stiff as heck, Cannot get right length (travel) shocks without special make, increases cost exponentially. If I had researched more thouroughly prior to purchase I would have chosen the Fabtech lift since they use the correct size rear blocks for my purposes.

from san clemente,ca |

Way overpriced on labor, will gouge your eyes out. [...]

from Colorado Springs, CO |
great fit

good fit but need u bolts the factory are little too short for me

from chicago il |

Question & Answers

6 Answered questions

Does kit come with center bolts?

Asked by Bin from New Hampshire on

Thanks for the inquiry Bin, the Pro Comp Suspension Rear Add-A-Leaf Kit part # EXP13134 these do come with center bolts.

Answered by from New Hampshire on

I have an 08 FX4. Will my u-bolts work or will I have to replace them?

Asked by Charlie from Huntsville, Texas on

Charlie- Thanks for the question. The Pro Comp Suspension Rear Add-A-Leaf Kit will fit with your stock U bolts. New U bolts are always recommended when you are changing or modifying your leaf springs.

Answered by Mike from Huntsville, Texas on

Is this Add-A-leaf compatible with factory shocks? Or, does the 1-1.5 inch lift require shocks with different travel?

Asked by Dave C. from Springboro, OH on

Hello Dave C, Thank you for the question. We suggest you upgrade to a longer shock when installing this add-a-leaf kit

Answered by from Springboro, OH on

See all questions & answers


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