The Race Series kits feature a split-tapered bushing which expands as preload is added to the assembly ensuring a precise fit. The customer can trim the top flange of the bushing based on caster/camber needs, the kit includes instructions on setup and trimming.
- 7075 Aluminum Split-tapered bushings with cone washer
- 7/8″ FK Spherical Bearings (F1 Fit) with C Clip (welded)
- 7/8″ Teflon lined Spherical Bearings with C Clip (press fit)
- Viton Seal with machined shim (press fit)
- 4130 cups
- 7/8″ Grade 8 Socket Head Cap Screw (170,000 psi tensile strength)
- 7/8″ Low profile locknut
- *Marketed as “Offroad Use Only”
A complete axle system includes a choice for Upper Pair as well as a choice for Lower Pair.
Upper Pair: Please choose an option based off of the year vehicle your axle was originally installed in as well as your desired bushing offset (0 degree, 1.5 degree, or 3 degree). Off-road rigs generally benefit from a 3 degree bushing to gain negative camber while lifted rigs also benefit in that they can gain back the positive caster lost when lifting. The 1.5 degree bushing option is available for more “stock” applications. Popular settings are -3* camber (mostly used in Ultra4 style builds), -1.5* camber/+1.5* caster, -1* camber/+2* caster, and -.5* camber/+2.5* caster.
Lower Pair: Stock lower balljoints see less failures but are susceptible to “push out.” This happens when a shaft breaks and pushes the joint out the bottom of the knuckle. The lower system uses the same basic design as the upper, with a steel cone to match the tapered hole in the knuckle.
Fitment: The press fit systems provide the same strength and longevity as the welded systems but with a less involved installation. If you have a set of Currie Aluminum knuckles and are searching for a better joint, you’ve found it! With the welded kit, the cup can be welded on both sides preventing a push-out from either direction.