2008 f150 MAF rate?

What’s the normal maf rate for a 2008 f150 5.4 v8. I’m getting about 1lb/min at 650rpm idle, 3.1-4.5lb/min at 1200rpm and the highest I’ve gotten is 4.9-5.4lb/min at 1700rpm. I’ve cleaned the sensor several times but I don’t have readings from before cleaning so idk if it did anything. And I don’t know if it makes a difference but I have some pretty bad exhaust leaks around the catalytic converters and through out the rest of the exhaust

thebax20062019-09-17T11:56:17Z

Why you even messing with the motor? The MAF readings seem ok. Fix your exhaust leaks.