Pretty sure most people will tell you to stick with what you have and spend that kinda cash elsewhere.
For example on a remap to help iron out that flat spot you might be experiencing from using a decaf pipe.
Gawwwwwwjus looking car!!!! Love what you've done. Coils make such a difference. I'm thinking about getting some spacers too but don't wanna ruin anything.
That said what's another 10mm to worry about!
Just stick with the standard one dude. Save your cash and get an itg panel filter would be my advice.
Spend the money elsewhere on a nice ultra racing brace ;)