QA1 High Travel Coil-Over Spring - 2-1/2" I.D. x 12" Tall - 110 lb. Fragola Performance Systems A perfect sealing surface is

A perfect sealing surface is assured with the 5/16" machined flanges

1962-1974 Chrysler New Yorker

357 cc Intake

They may reduce engine and solar heat transfer by 30F or more and sound transfer by 12 decibels or more

1966-1985 Lincoln Continental

QA1 High Travel Coil-Over Spring - 2-1/2" I.D. x 12" Tall - 110 lb. Fragola Performance Systems A perfect sealing surface isPowder 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.