QA1 High Travel Coil-Over Spring - 2-1/2" I.D. x 12" Tall - 350 lb. 6-3/4 Installation of these brackets requires

Installation of these brackets requires the use of new stock OE 4th-gen F-body LS engine mounts (ex: GM 22179268 or Anchor 3064) or aftermarket polyurethane inserts (Prothane 7-512 or Energy Suspension 3-1151 Compatible with Holley Accessory Drive System P/N 20-136 or equivalent in all spacings

Full Range of Adjustment: 16

Cadmium plated steel fasteners provide quick fastening of body panels

Roller Camshaft Conversion

QA1 High Travel Coil-Over Spring - 2-1/2" I.D. x 12" Tall - 350 lb. 6-3/4 Installation of these brackets requiresPowder Coated, Chrome Appearing Silicon Manganese SteelAll QA1 springs are manufactured using the highest quality chrome silicone. This material offers high strength, consistency and longer life. Cold Wound Heat Treated Shot PeenedAll QA1 springs go through intensive manufacturing processes to ensure consistency, accuracy and durability. Squared EndsAll QA1 springs are ground at both ends to ensure straight, consistent and accurate operation.