Supertech exhaust valve for Nissan CA18DET engines is offered as an Inconel construction, oversize +1mm component with dimensions 28.15 x 5.97 x 88.30mm, sold as a single valve for dual/single applications as noted. The valve is specified for CA18DET fitment and uses Inconel material where listed. The listing identifies the valve as an exhaust component with the stated oversize and dimensional specification for applicable Nissan engines.
Supertech Nissan CA18 DET Exhaust valve 28.15x5.97x88.30mm / Inconel / +1mm - Single (D/S Only)