Progressively wound springs using Kobe super-clean, chrome silicon-based wire that is heat treated and shot peened Tight-tolerance, FEA-designed hardened steel Posi-LocÖ style upper retainers to ensure correct assembly height and resist keeper "pull through" Hardened steel basewashers control lateral movement Kits use OEM-style valve keys (sold separately) Made in the U.S.A.. SPRING KIT BEEHIVE M8 TI
