Can anyone explain to me what a downpipe is. I know this is a stupid question. For some reason (some one told me ) and this still maybe the right answer, just double checking, that the downpipe is the part of the air intake that goes down and out to make it a cold air intake.
Thanks
Eric

 

Actually, a downpipe is part of an exhaust sytem for turbo cars. It connects the cat to the turbo.

 

I believe what is traditionally reffered to as the down pipe is on the exhaust side of the engine. We usually call the whole thing a header. The top part (on a Honda 4 banger, the 4 into 2 part) is the exhaust manifold. The next part (the 2 into 1 part that then goes under the engine to the cat) is the down pipe. I think.
Anyone please correct me if I'm wrong.

(OF course there is a 4 into 1 header, but them things is one piece)

 

that part is accually the -A- pipe. the down pipe is the output of the turbo to the cat.

 

Well at least Spoon Sports agrees with me.
Check out their Air I/O section http://www.spoonsports.ca/civic.htm

 

i wasn't disagreeing with you,most times the lower 1/2 of the exhaust manifold is refered to as the -A- pipe.so that is probably what the question was more aimed at.

 

are downpipes street legal and do they get rid of your cats?

 

yes it is legal and no it doesn't replace the cat.That is a test pipe

 

downpipe is only for turbo cars?