In some cases, when you install other than stock wheels on your car, you may find you have to space the wheels out slightly. Sometimes in the rear or in the front and rear. We carry two different thicknesses of cast aluminum spacers. One version is 3/16″ thick and the other is 5/16″ thick. In most cases, you can use either of these spacers and still have enough threads on the stock wheel studs to secure the new rims to them. If you find your current tire and wheel set up rubs the frame rail under hard acceleration, one of these spaces may be enough to give the clearance you need to eliminate any tire to frame rubbing action. Spacers are sold as a pair.