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Aluminum filler neck, 3‑inch with 12‑thread, from Peterson Fluid Systems provided in a raw finish for use with billet aluminum caps. Designed to pair with Peterson billet caps for drag‑style oil tanks, the filler neck supplies a threaded filler interface compatible with the manufacturer's cap hardware and O‑ring sealing system.
Peterson Fluid Systems Filler Neck Billet 3-12
