The body is 6061 aluminum that is water jet cut. We milled the critical sealing surface. The shaft is 316 st. st. The valve is also is 304 st. st. that we water jet cut. The frame is 304 st. st, also water jet cut and then bent to hold the vacuum actuator. I have several of these from my VOE-GTO muffler experimentation project. I hid a vacuum canister under his body on the frame rail and it has a pneumatic switch mounted to the steering column that opens and closes these. I used the small ball reservoir and this kind of switch (in photo).ATTACH=full]1715237749[/ATTACH]
View attachment 1715237749
