QA1 MOD Series Front Coilover Kit - Double Adjustable, Large Tapered Flat Spring, 400 lbs/in Rate - 1978-1987 Pontiac Bonneville bilstein-m-9100-coilover-60mm-monotube-suspension-shock-absorber-length Full-length ride-height adjustment separates preload

Full-length ride-height adjustment separates preload from ride height — meaning you can drop the 86 ZN6 to the height you want while preserving spring travel and shock stroke

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QA1 MOD Series Front Coilover Kit - Double Adjustable, Large Tapered Flat Spring, 400 lbs/in Rate - 1978-1987 Pontiac Bonneville bilstein-m-9100-coilover-60mm-monotube-suspension-shock-absorber-length Full-length ride-height adjustment separates preloaddon't be limited to adjustments! Completely re valve in minutes with the MOD Series Shock. Designed specifically on your 1978 1987 Pontiac Bonneville 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