They are CT springs made by Betts. They will work with stock arms if you flip the upper ball joint and run low profile droop stops. I'll throw in the 5/16" hardware and some 4130 spacers that I cut out if you're interested in running them with the stock UCA.
Here's a pic. They raised my 04 regular cab 2rz about 2.5"s, they'd probably raise an 01-04 extra cab around 1.75 - 2". The ride is stiffer than stock but not as stiff as the Fabtech kit. They will work with OEM upper arms but would work best with a Downey upper. :waytogo:
Is this ride height? It looks like the UCA is touching the low-pro bump stop. Also, what kind of spacer do you have for the bolt in between top and bottom of UCA. I've seen people referece CT coils in the past, but never found a vendor. Any leads?