The Kyosho LA-27 parts bag contains the front hub carriers (or c-hubs) in which the steering knuckles are mounted.
The standard setup features a castor (front suspension angle front to rear) which you can change by choosing to screw the front suspension bracket into the upper or lower screw holes of the front gearbox.
Alternative
The LA-59 hub as featured on the ZX-R mk2 and ZX-RR is a direct replacement for the LA-27 as it only adds an extra hole which widens the track by 3mm (using the W-5063 universal joints measuring 65.5 mm as opposed to the W-5061 of 62.5 mm) and increases the castor by 7°.
