QA1 MOD Series Front Coilover Kit - Double Adjustable, Large Tapered Flat Spring, 550 lbs/in Rate - 1973-1977 Buick Century SLS The 5200 Series for the

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QA1 MOD Series Front Coilover Kit - Double Adjustable, Large Tapered Flat Spring, 550 lbs/in Rate - 1973-1977 Buick Century SLS The 5200 Series for thedon't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1973 1977 Buick Century to meet the demands required by today's high performance drag race and handling pro touring cars, QA1's multi patent pending MOD Series shock will transform the way racers respond to changing track conditions and configurations. The key element to this tunability is QuickTune Technology: dry modular valve