Forged one-piece construction to help with weight reduction & improved flow
Performance valves receive a swirl polish, smooth stem treatment, and are made of 21-2n/suh35ht stainless steel
Springs are made of swosc-v material (oil-tempered steel wire)
Some springs feature a progressive style design with more coils on one end of the spring
Progressive springs are heavier on one end and should always be installed towards the bottom
Non-progressive springs are paint marked and should be installed towards the top
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