For GT-R owners looking to maximize the capabilities of their modified suspension (coilovers, etc.), the adjustable range from the factory is insufficient. With that in mind, Top Secret offers a selection of replacement suspension arms which have a wider range of adjustability than the OEM components.
With regards to camber adjustment, the factory front control arms in particular are very limited in their range, so when lowering your GT-R, it is very difficult to reestablish proper suspension geometry. With this in mind, Top Secret offers their replacement Adjustable Front Upper Control Arm Kit.
The Top Secret Upper Control Arms use shims in combination to provide a wide range of camber adjustment. The inner bushings are upgraded over stock with more solid, pillowball bushings to provide a more solid suspension feel with more efficiency as the factory rubber bushings compress under load, causing minute changes in geometry