The Detroit Speed mini-tub leaf spring kit accommodates wider tire and wheel packages. The spring rate of 150 lb/in, and lower your car 2-inches from stock. Our leaf springs are superior to others because of the great handling without sacrificing ride quality. In addition, the spring is biased, so the front spring section controls the spring wrap during hard load conditions. The springs have a tapered leaf with an anti-friction pad between each leaf to help provide a smooth ride. Consider these upgrades when compared to other leaf springs. The Detroit Speed rear Mini-Tubs are available separately, 040404DS. Also, a complete mini tub kit is available, 041229DS.