Anyone know of a good quality rear block kit? For an 04 dually. A few inches. Just to put it up a little in the back. Thanks!

 

If it already has a 4" block, look at an add-a-leaf or airbags. Don't stack a second block on the one that's already in there.

 

X 10, ADD-A-LEAF. DO NOT STACK BLOCKS.

 

Okay looking for leads now lol thanks guys

 

You can always replace your 4 inch blocks with 5 inch blocks. Some companies that come to mind are:
1. Ready lift
2. ICON Veh Dynamics
3. Rough Country

 

given any thoughts to air lift since your running the duals?
nicer ride and flexibility...

xtof

 

Too bad your probably not near me in Alberta, I have a 5.5" lift block set for the rear and a add a leaf kit. Bought an 8" lift kit and got the additional leaf springs. Now I have a 5.5" block set and add a leaf set with new u bolts available