Lowering springs not only improve the look of your car but also help with traction. Depending on what type of driving you do and what power level you're at will determine the best spring for your application. Here at Lethal Performance we've had great success running both Eibach and BMR Suspension springs on our cars. The Eibach Pro-kit springs will give your car a nice even lowered look and have great drivability. The Sportline springs offer a deeper more aggressive drop then the pro-kits do while still offering great drivability. Next up are the spring offerings from BMR suspension. BMR offers three different style springs for the 11-14 mustang. Each spring designed to be used for specific applications. First off are their performance springs. These springs offer a 1.5" drop and are geared towards every day street use but will also work pretty well if you're going to the drag strip occasionally. The next offering from them which also provides a 1.5" drop are the handling springs. These have a higher spring rate which is geared more towards road course and autocross applications. Last but not least are the BMR drag springs. These also offer a 1.5" drop from stock and are designed to give you the best performance at the drag strip. The spring rates on the drag springs are designed to allow for better weight transfer at the drag strip improving your launch and getting those 60ft times down.