I bought a used AFE Stage 2 Intake off a member on here. Its got the Pro Guard 7 filter with it that is yellow. When I got it the filter was black and dirty. I bought a cleaning kit and did what it said but after cleaning it and oiling it the filter still looks black. I was hoping it would turn yellow again. Anyone else have this filter and have cleaned it? I was just wondering if I did something wrong or what? Will it never be that yellow color again? I sprayed cleaner on and let it sit like 15 minutes and then rinsed it off and the let it dry and then sprayed it with the oil that looked like it was tinted yellow but the filter still is black looking. Thats what it said to do. Thanks