The Mazda MX5 Frame Rails fit both NA and NB variants and provide up to 30% stiffer chassis! The frame rails designed specifically for the MX5 to ensure that this well-steering sporty car will be even more fun. Also, on lowered cars, the frame rails ensure that the original bottom remains protected because you mount these frame rails directly over the original. By adding 30% extra stiffness to the chassis, you will find that the MX5 feels many times better over potholes in the road and during more serious cornering. For even more rigidity, you can also take a look at the butterfly brace we offer. This gives another up to 20% extra stiffness to the chassis! Manufactured from very sturdy 2mm Stainless Steel, laser cut and CNC edged. Comes complete with all necessary bolts and nuts. To mount this product you need to drill into the soil, always treat the drilled holes with a rust inhibitor.