The Supertech Inconel exhaust valve set for Honda B16A/B18C is a +0.5mm oversize option supplied as a set of eight. These Inconel exhaust valves are listed for B16A and B18C applications and the oversize dimension is specified for valve sizing needs. The product description provides material, oversize and application to confirm compatibility with rebuild or valve work.
Supertech Honda B16A/B18C Inconel Exhaust Valve - +0.5mm Oversize - Set of 8