I originally had the Air Raid Jr with the Synthemax filter and I picked up a few noticeable gains, but I had to clean the filter every week. That was a pain. I went ahead an got the MXP box with the huge filter from Air Raid. It has a ram intake from the front and bottom. I would guess it doubled what I got for HP increase, which wasn't huge to begin with, but the filter performance is outstanding. It will go a long time without cleaning. Her's a link to another post with some videos of my exhaust and a couple runs.

https://www.performancetrucks.net/fo...nstall-505394/

 

Why did you have to clean it every week? I've had no issues with mine...

 

I'm not sure. The only thing I can think of is because of that hole in the fender and I also drive at least 150 miles daily. It would be enough that you could see black dirt layering and blocking the red filter color out. My new one doesn't do that at all.

My truck was hit on that side by a large gas well truck, so maybe the body shop didn't do something right putting it back together.

 

That would make sense. I do a pretty good deal of offroad playing and it's dusty as hell out here and I don't seem to have a problem.

 

I did the K&N on my 2008, flows and sounds awesome! Next is Corsa sport catback.