Originally Posted by Chris142
I installed this fram air filter on 9-14-19. Roughly 8 months later it is this plugged! I do not know the exact milage but around 7k. The sun was directly behind the filter. Unable to pass light.
If you look at the 8th full pleat from the right, you see an area, that appears to have 4 pin holes in it. Is that a damaged filter?
the sunlight test is for K&N cotton gauze filters, showing how well it can let dirt through