Mountune always provide great service and had this item on sale so had to jump at the opportunity of getting this RTR item. FJRS (their appointed workshop) did the installation and are equally a great team offering a great service with a personal touch. The Product: These RTR Tactical Performance Lowering Springs gives the mustang a more aggressive stance and eliminates the tyre to fender gap from the stock/factory springs. I could instantly feel the improved driving performance on the way home. While the change in height is quite subtle, the visible difference to a Mustang owner is noticeable, and these springs from RTR just adds to the look of the Mustang but at the same time improving driving. So happy I had these fitted and would recommend these to anyone considering lowering springs. These compliment my RTR axleback exhaust and RTR decklid also supplied by Mountune.