For use with Retroford MK1 and MK2 Cortina Rack and Pinion Steering Kits.
2.9 ratio gives 2.9 turns from lock to lock which is ideal for road use.
2.4 ratio gives 2.4 turns from lock to lock which is ideal for fast road, track day or race use.
LHD racks are only available with 2.4 ratio.