Okay so I haven't heard of anyone else with this problem, but I installed my antifouler but the end hits some kind of bushing or something. anyways here are some pics and please let me know if you have any idea on how to fix it, the sound is really annoying when the two metals hit!

 

Its looks like your anti fouler is slightly off center. Like in the third pic everything looks curved down try reinstalling it

 

Looks like you got it cross threaded.

I have the megan s-pipe and I have several inches of clearance.

I don't know what others are doing but you might want to try ditching the stock s pipe when you can.

 

Thanks everyone for you imput..... I jacked the car up today to see if it was cross threaded or not, and it's not, it's screwed in fine. I did notice that the socket were I screw it in is leaning down, so maybe it was welded wrong or something. I'll take some more pics later.

 

are you sure your manifold is centered with the spipe. If those bolts aren't even it couldl cause it to tweek like that.
also check all of your hangers and make sure everything is sitting the way its supposed to.

Good luck

 

if MMW sells theirs on its own it is L shaped, that might work but it might only be available with the header/spipe combo.