Upper Control Arms

Dirt King UCA or SPC UCA

 

JBA

 

SPC is more of a typical balljoint type whereas DK utilizes a uniball at the spindle mount. DK also has the bushing or heim joint option. It really depends on your application.

Ball joint style uca typically are more resilient in regards to corrosion/weathering as they are usually sealed and come with a serviceable zerk fitting. SPC also allows for a substantial amount of adjustment compared to a uniball uca.

Uniballs have less slop, unparalleled consistency and more "terrain feel", but require diligent maintenance (lubrication of components every few hundred miles) and are more susceptible to misalignment due to dirt and grit getting within the seals. Most variants are of a fixed alignment spec and non adjustable.

Highly depends on your future plans. I would really only buy DK/TC/LSK Long travel components as the stock length variants are highly overpriced and do not provide any additional performance gain over SPC or even JBA.

 

I have SPC, love them so far. 80* of droop in the upper ball joint too. Ripcord has a breakdown of SPC joints in his build thread on here.

 

I have spcs no problems

 

I have some lightly used ProComp UCAs for sale if you're interested.