QA1 MOD Series Rear Pro Coilover Kit, 250 lbs/in Rate - 1991-1996 Buick Roadmaster E450 HKS Hipermax R coilovers for

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QA1 MOD Series Rear Pro Coilover Kit, 250 lbs/in Rate - 1991-1996 Buick Roadmaster E450 HKS Hipermax R coilovers fordon't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1991 1996 Buick Roadmaster 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