I used a hammer and chisel to get the plate with the four nuts welded to it out of my OEM air box. Then I had to shave the whole inside of it down about 1/16th so that the 3" adapter would slide into it. Once I did that I had to drill 4 new hole to line up with the suby spacing. It took about an hour, but it was worth it.
Now, it may just me thinking it's better, but it sure feels like I have a bit more power now. Seems to accelerate just a teensy bit better now.
Oh Yeah, did I mention that I took a pipe and cleaned out the inside of the cat? I have video of the junk blowing out of the cat here.










