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The Supertech black-nitrided exhaust valve for LS1 and small-block Chevy applications is a single replacement sized 1.600 x .3134 x 4.937 inches. Sold individually, it matches the dimensional needs of LS1 exhaust ports. Choose this valve for accurate seat and guide restoration during cylinder head servicing or performance rebuilds where these dimensions are required.
Supertech LS1 SB Chevy 1.600 x.3134x 4.937in Blk Nitride Exhaust Valve - Single (Drop Ship Only)
