Supertech Black Nitride Valves for Honda D-Series NON-VTEC Select::Intake 29.0mm (1 Single) (HIVN-1003-1) 18 or 24 inch lengths

18 or 24 inch lengths

The bottom of the AOS is shaped like a snail

dumptube and O2 housing

(1) Oil Sandwich Plate

Supertech Black Nitride Valves for Honda D-Series NON-VTEC Select::Intake 29.0mm (1 Single) (HIVN-1003-1) 18 or 24 inch lengthsSupertech black nitride exhaust and intake valves for NON VTEC D Series engines. These valves are available in various sizes to match your head diameter. Sold as a set of 8 or individually as needed. Please do all your research and consult your engine builder if necessary! Black nitride valves are made from one piece forged stainless steel then go through a special hardening process to lessen the friction between the valve and guide. Vehicle Fitment: