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Message: <blockquote data-quote="leforte" data-source="post: 300360" data-attributes="member: 1943">a great driver is only that when he can have a 100% dependability on his machine. as with the phrase above, its very sad for me to tell you by reusing the stock spring and just burning and compressing it and without sending the springs for a proper heat treatment after that ( long process), those morons is just giving you an express ticket to the morgue as your springs may fail without warning. if you are lucky, it will fails on a slow drive and you breath another day. please have them change for your own good.steel use in the springs or any other metal requires proper heat treatment or hardening after any machining work, welding or heating as this changes the molecular structure as well as the physical and chemical properties of the alloy. in the case of the springs, it may just snap. as the metal properties is weaken and is stressed internally which causes it to failed prematurely due to metal fatigue. a properly treated steel will be ductile and only fails with a measured force applied to it.</blockquote>