CJC Built 2017+ Ford Super Duty 3.25" Rear Block Kit

CJC3.5FORDBLOCKS

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Regular price $319.99 Save $-319.99

-1516 in stock

This 3.25" tall "Tremor" block kit uses genuine Ford rear blocks from Tremor package trucks, along with our USA made, Zinc plated U bolts and hardware. This kit incudes everything you need to swap the rear of your 2017+ Ford F-250 or F-350 to  the same height as a Ford Tremor while maintaining the stock leaf packs. These blocks are the perfect compliment to a 2.5" or 3.5" leveling kit if you find that the stock blocks are too low. 

Starting in 2020, Ford lowered all non-Tremor trucks. To make things more confusing, Ford also specs different block heights depending on the trim of the truck, which means that sometimes a leveling kit causes the truck to sit rear low. These blocks are the answer. 

Please note that these blocks are compatible with standard airbag kits that mount off the block "tang" but these blocks are NOT compatible with Carli long travel airbags or with Carli leaf packs. 

These blocks are not dual rear wheel (dually) compatible. 

 

 

Customer Reviews

Based on 46 reviews
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M
Mark Sprinkle

CJC Built 2017+ Ford Super Duty 3.25" Rear Block Kit

H
Harold Morris
These are great

I installed these on my new 2026 F350 SRW with the FX4 package. When I first got the truck, I hooked up my nearly 20k with 3800# pin weight and the truck dropped 3.5-4in in the rear. It sat down about 2in below level. After that test, I was already planning to install a 2.5in leveling kit along with having my rear factory springs re-arched to gain about 1.5in rack and replace the single overload with a 5-leaf HD overload. When I hooked up the same trailer after those mods, it was still about 1.5in low in the rear. With this 3.25" Tremor block, the truck is level with the heavy pin weight and has the factory ride unloaded. I do have a 2" rake unloaded, but it looks good with 35s and the higher stance.

L
Lawrence merrow

CJC Built 2017+ Ford Super Duty 3.25" Rear Block Kit

S
Sean Hunt
Blocks

Thanks for keeping these in stock

K
K. McNally
Superduty 3.25 block kit

The product was great! Factory Ford blocks and bolts were perfect as advertised! Unfortunately I never measured my blocks(I’m a dummy) and for some reason my 26’ XL stx came with larger blocks in the rear, so I won’t be able to use them. Great quality, fair price and fast shipping!