QA1 MOD Series Rear Pro Coilover Kit, 170 lbs/in Rate - 1973-1977 Buick Regal Mazda 5 The D2 Racing RS Series

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QA1 MOD Series Rear Pro Coilover Kit, 170 lbs/in Rate - 1973-1977 Buick Regal Mazda 5 The D2 Racing RS Seriesdon't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1973 1977 Buick Regal 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 packs