QA1 MOD Series Rear Pro Coilover Kit, 170 lbs/in Rate - 1973-1977 Pontiac Grand Prix S5 Sportback AST Suspension designed the Competition

AST Suspension designed the Competition 3-way adjustable series to fit the 2005-2007 Subaru Impreza WRX 2

2014 BMW X5 (w/ EDC Incl EDC Delete Module)

2008 Chrysler 300C (LX)

Every kit is extensively tested on the XU40 chassis and refined until it balances ride quality with performance — the reason Highlander coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide

QA1 MOD Series Rear Pro Coilover Kit, 170 lbs/in Rate - 1973-1977 Pontiac Grand Prix S5 Sportback AST Suspension designed the Competitiondon't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1973 1977 Pontiac Grand Prix 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