So I decided to upgrade my horn and put something a bit more aggressive, I thought this would have been an easy task but got stomped half way into it.
I removed the 4-phillip head screws and the plastic pins. But does anyone know how to remove those 5 to 6 aluminum pins or rivets that hold that plastic shroud in place in order to get access to the horn beside drilling them out. Does it require a special tool or something

 

Any suggestions or thoughts anyone and besides taking the bumper off too.

 

Any luck with this yet? I have the same dilemma.

 

@Reggaetrix I found this. Not my best option though. I don't like having to drill.

DIY Horn Upgrade

 

I actually used this one to get to horn. It is a bit long but worth the read.

Install Bug Screen with Gutter Guard and Pet Screen

 

This is by far the best way to get at the horn for replacement. Drilling off the rivet heads is not a big deal. Use 9/64" drill bit and do not drill through the shroud, only the head of the rivet. Pay particular attention to later posts in this thread (mostly added by me!) that clarify some of the earlier instructions.