QA1 MOD Series Rear Pro Coilover Kit, 300 lbs/in Rate - 1978-1983 Buick Estate Wagon bilstein-b4-oe-replacement-dampmatic-twintube-suspension-strut-assembly 6 16V (MC1) The 5300

6 16V (MC1) The 5300 Series shock absorbers are rebound adjustable in 12 positions on the strut

Every kit is extensively tested on the JZZ30 chassis and refined until it balances ride quality with performance — the reason SC300 coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide

Vehicle-specific spring rates tuned for a comfortable daily ride with enthusiast handling

For Infiniti G37X owners who want bags — not a race suspension — the Airtech Basic is a straightforward

QA1 MOD Series Rear Pro Coilover Kit, 300 lbs/in Rate - 1978-1983 Buick Estate Wagon bilstein-b4-oe-replacement-dampmatic-twintube-suspension-strut-assembly 6 16V (MC1) The 5300don't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1978 1983 Buick Estate Wagon 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