QA1 MOD Series Rear Pro Coilover Kit, 170 lbs/in Rate - 1973-1977 GMC Sprint General XP 4 1000 AST Lowering Springs for the

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2008 Porsche 911 Carrera 4 / Carrera 4S w/out PASM (997/997 Turbo)

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QA1 MOD Series Rear Pro Coilover Kit, 170 lbs/in Rate - 1973-1977 GMC Sprint General XP 4 1000 AST Lowering Springs for thedon't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1973 1977 GMC Sprint 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