So my Motordyne ART pipes got here today and im probably gonna install them myself tomorrow. I was just wondering if there is any consequences if i run these w/o a tune?

 

Should have no issues, the tune will just optimize your additions. FWIW be sure to spray the cat bolts w/ a 50/50 mix of Acetone & ATF for the best rust breaker. I'd do it tonight and let it soak a while. Here's a thread I did a while back w/ tools that definitely helped. https://www.myg37.com/forums/g37-sed...y-be-atch.html

 

No issues here a tune will be beneficial in the long run but not going to damage anything if you don't get it

 

With my FI test pipes I started running rich, so I ended up having to get a tune. It wasn't hurting the car but it was hurting my wallet