I have a 2008 superglide with rinehart churchill exhaust,K&N upgrade stock filter,and a fuelpak,trying to figure out how much air flow difference there would be if I changed to a S&S stealth system,I think the bike might need more air than it is getting with the upgrade that is on it now but can"t find the flow difference.The backing plate on the stealth air cleaner seems to be real sturdy and I can use the cover I have now

 

The steath has a coned black cover that apparently helps direct flow into the throttle body to increase flow. There are a couple videos on youtube to check out.