its a honda civic what else is slow with a muffler, well m muffler is low, actauly doesnt realy sound different... but looks better.

the smoke is a gray/white

and it makes sense that now i can see the smoke more due to the muffler not filtering the air as much, so a head gasket, hmmmm, is there anything else i can conseder? it cant be the valve seals, cause that makes it leak oil right, if im leaking coolant, why isnt my coolant resevre empty or anything like that? is it leaking very very little..?

Thx for all the help everyone, and sorry for the bad spelling, im in a rush when im online, between school and work, sorry.