Probably a rotted exhaust pipe has broken off. Take the car to a muffler shop for repair.
cause it's junk
Head gasket is leaking
Black smoke from the exhaust indicates it is putting too much fuel into the engine. Take it to a mechanic and have it checked.
your exhaust may be jammed
there is no water mixed with the oil but have antifreeze coming out of the exhaust
Assuming that you are asking about installing an after-market audio amplifier to boost the sound coming from the factory radio in your Forester, this is still too broad in scope to give a meaningful answer here. Contact www.crutchfield.com. These people are experts in car audio. --Ken
What is the roaring noise from a 1999 Toyota Camry XLE at speeds over 35 ? Sounds like it is coming from the rear.
Use a code scanner to figure out what's wrong. There isn't much point in guessing. If the light is on the computer has stored a code.
It could be condensation from hot exhaust gases on the cool exhaust pipe.
NO
no
white smoke is coming from my exhaust why?