[RG m3]

I sent Eventuri an email this morning asking how the plenum is built and if there are any lock nuts on the screws underneath the epoxy.

I got a prompt response from Bilal and here's what he said:

"The screws are held in place with lock nuts which sit on a carbon flange that is part of the trumpet. Then they use epoxy over the nuts as an added measure."

"Adding the lock nuts was a bit tricky but just about had enough space. Also we are using Aerotight lock nuts which don't come loose under vibrations like the traditional nuts do."

So the velocity stacks are not sandwiched between two pieces but secured to the throttle body adapters via the screws and nuts. If I understand correctly, the bottom of the plenum is what is sandwiched between the velocity stack and the throttle body adapter.

This puts me at ease that the plenum should hold up over time. Infinity Design's S85 plenum and upcoming S65 plenum are built similarly, bolting the throttle body adapters to the velocity stacks to eliminate failures. This is according to what Salman at Infinity told me.