Supertech Inconel exhaust valve for Nissan RB26, listed as 31.15 × 6.94 × 101.20 mm with a +1.0 mm nominal sizing, sold as a single. Intended for use in RB26 exhaust ports when a slightly larger seat diameter is specified; matches the valve dimensions needed for selective replacement or head work on RB26 engines.
Supertech Nissan RB26 31.15x6.94x101.20mm Inconel +1mm Exhaust Valve - Single (Drop Ship Only)