So I have decide I want to do a Muffler Delete on my 2013 G37x awd sedan. I ordered exhaust tips online that I will be getting someone to weld on alongside the muffler delete. The only problem is i don't know what piping/piping dimensions i need to do this. My G is fully stock, any help is appreciated

 

I think it’s 1 3/4 piping. It’s ridiculously small.

 

I ordered an axle back/muffler delete from eBay. Might be cheaper than having someone weld tips on. Think I paid 140 shipped. Looks great, sounds decent too.