is their any consequences if im running with my open manifold on my ex civic?
oh and 1 other quick ? what does JDM stands for i just hear it all around.

 

yeah open manifold *header* is gay and loud and you dont go anywhere and cops will hate you


JDM = Japanese Domestic Market

 

Japanese Domestic Market JDM

 

but what i mean is that could it make something go bad with the open manifold or Header

 

yes.. if u drive ur car in the cold and ur engine gets to operating temperture and u shut teh car off.. u could suck in cold air.. wich will bend valves or somethin i forgot what it does. but it is not good for your motor at all dont do it its stupid