The Supertech Inconel exhaust valve set for Honda K20 engines includes eight valves with 30 x 5.96 x 108.65 mm dimensions, 6 mm tapered stems, and a chrome finish noted in the source. These tapered-stem Inconel valves are specified for exhaust service on K20 heads and are supplied as a matched set to support complete exhaust-side replacement during rebuilds.
Supertech Honda K20 30x5.96x108.65mm 6mm Tapered Stem Chrome Inconel Exhaust Valve - Set of 8