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This GFB replacement gasket is specified for older Response blow‑off valve models gfbT9003 and gfbT9503 and matches the original flange gasket design. The product description notes newer valve variants use an O‑ring and thus may not need a gasket, so this part is intended primarily for servicing legacy Response valves that originally shipped with a gasket seal at the flange.
GFB Gasket for Response BOV (For gfbT9003 & gfbT9503)
