GKTECH 350Z/370Z REAR KNUCKLE SPHERICAL BEARING UPGRADE (SET OF 8) (Order in)NOTE: This item is specially ordered from GKTECH Australia and usually takes around 3 4 weeks to arrive. Listing is for: 1x Set of 8 bushes Want to reduce bush deflection and change out your tired OEM rear knuckle bushes? We have the solution. We have made replacements, however, they are a spherical bushing rather then a polyurethane or rubber bushing to significantly reduce bush deflection and ensure a much smoother operation throughout the range of