The Bilstein B12 (Pro-Kit) is the result of two companies atop their industries collaborating to present the ultimate solution in suspension for the passenger car market. The shock absorber experts at Bilstein and the spring professionals at Eibach used their 120 years of combined experience and knowledge to spawn Performance2. The B12 system consists of four high performance Bilstein dampers, four hi-tech industrial Eibach lowering springs and together you have the best handling, most comfortable direct fit suspension system available today. Complete Suspension Kit Mercedes-Benz 300SE 1991-1988; 300SEL 1991-1988; 380SE 1985-1984; 380SEC 1983-1982; 380SEL 1983-1981 Mercedes-Benz 300SE 1991-1988, 300SEL 1991-1988, 380SE 1985-1984, 380SEC 1983-1982, 380SEL 1983-1981