2 air filters
I have a 1989 Winnebago Chieftain with a 454 and Qjet carb. What is the inner air filter for and how do you clean it?
Forum Discussion
I doubt this is one, but there are air filter setups that have an inner filter portion that serves as something of a "last chance" filter. I believe it is designed to filter the air to some degree should something happen to breach the main filter. However, the theory about the pictured screen serving as a backfire protector seems very plausible.
