mfi heat exchager question
 

i am cleaning up the mfi heat exchangers and in the one tube that leads to the intrake air filter warmup device there was a screen in that outlet but it was completely gone, is there a replacement or does someone have a suggestion of what size screen to use?

The rear section on the heat box was considered the “street sweeper” and many people disconnected the piping because it would clog the air filter.
Bruce