As far as I am aware yes.

 

picking up the plug tonight at autozone!

So last night we got it all installed. but i didnt have a plug for the o2 sensor so we threw a puddy on top of it (qwik weld?). also i didnt have replacement gaskets for the x to mid pipe because i didnt know i would need to take that apart. They were destroyed! so i just tightened down the flange and drove home. RATTLE RATTLE RATTLE. this was the WORST sounding exhaust system ive ever heard. made a civic look like a lambo.
also the puddy melt/shot out. So im picking up some anti seize, a thread chaser, gaskets, and o2 plug today and throwing them in tonight. should sound good tonight!

thank you again everyone for all of the help!!!!

 

For anyone still reading - got the plug (didnt have a chaser in stock, didnt need it), and gasket. got it all installed!!

afraid to rev the engine past 4k becuase now i know im gonna be running lean. not sure i like the sound in the mid range tho. gets kinda metallic/high pitch. hard to explain. but definitely not the rich/deep g35 sound. looking to hopefully trade for a gemini + cash or something like that in the next week or two before my tune. if not... ill live with it. although if i went from a q300 to a gemini or something like that after the tune... would it matter much? would i need a retune? this isnt for race purposes, just my DD.
i cant imagine the differences being high enough for the ecu to not be able to self correct that