W30 was a performance option offered by Oldsmobile in the late '60's-early'70's on the 442. Do you mean WS-6? That was originally a suspention package Pontiac offered on the f body (Formula,Trans Am) 1978 thru 1992. Pontiac later revived this option on the 4th gen firebirds to be a performance option that included ram air induction and a higher level suspention with 17x9 wheels.
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