5X Racing Stock Class Autocross Bump Stop Kit for Miata NA/NB

Stock/Street class SCCA Autocross rules specify the use of stock springs but do allow shock and bump stop changes. However, the bump stops do not engage earlier than on the factory setup.   Installing these 58mm (about 2.28 in) tall stops is shorter than the factory NA or NB bump stops and can be used to dramatically change handling behavior. They effectively raise the cornering spring rates and balance the car since the bump stop spring rate is now added to the mainsprings rate.    Different bumps stop stiffness front versus rear can be used to change handling behaviors while keeping your factory springs.  Kit includes: two 58mm (about 2.28 in) RED (soft) bump stops for the front, two 58mm (about 2.28 in) WHITE (medium) bump stops for the rear, four fender washers appropriate to your choice of shock, shock spacers (if needed) for your choice of shock  Bump stops are engineered to be paired with today's most popular shocks!  Consistently outperforms any other material currently