del west 1.6 titanium exhaust valves, set of 8. These are some 1 race nascar take offs I bought 15 years ago and never got around to using. They are 11/32 stem, 1.6 diameter , 5.140 length which is commonly referred to as a +.200 long , and use regular type valve locks. This design was BEFORE they changed production to the fancy bead lock design, so you can use common traditional valve locks on these valves.