So I am planning on installing some Lts and catless true duals here in the next couple weeks. And Im going to be doing My cam swap and tune in the begining of june. So my question is how shitty is my truck going to run if I get the headers and exhaust on and wait a couple weeks until i get the tune when i do the cam swap? Should i wait to install the headers and exhaust until a couple days before the cam swap or will it be fine for a couple weeks without the tune?

Thanks in Advance

 

It should be fine without a tune.

 

It will run fine, just dont expect **** for gas mileage, and a check engine code.

 

It will run just like before.

 

ok cool..i knew i would have a check engine light i just didnt know if it would run like ****.