Each spring is loaded in the spring tester at the factory, then compressed and the CNC load cell measures the force for a variety of spring lengths. This allows BMR to offer a LIFETIME WARRANTY against spring sag.Blending aesthetics and performance, BMR has designed the SP075 for the hardcore drag race crowd who regularly use their cars on the drag strip. These springs will drop your GT500 approximately 1-inch and feature a fine-tuned spring rate to give you better launches. The 165 lb./inch front linear rate spring and 160 lb./inch rear dual-rate spring offer plenty of weight transfer for hard launches. When performance and looks are a must, rely on BMR's suspension!BMR rear springs retain the factory "hourglass" shape designed by Ford engineers. This important feature provides a "variable natural frequency" in the spring to help counteract damaging wheel hop. This is a feature of the OE springs often overlooked by other companies simply because they don't realize it's benefits in multi-purpose applications.BMR's suspensions SP075 lowering springs are available in red powdercoat for long-lasting good looks. Installation time is about 2-3 hours. Proudly made in the U.S.A.

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