ryan_gwa

Evening,

I have recently discovered that my MY00 has had both the centre section and up-pipe decated. Will the car be alright with just a up-pipe Cat for its MOT? Its the cheaper of the two and I dont want to spend money on a cat that wont be on for longer than a day (hopefully).

This shouldnt have damaged the two llambda sensor should it?

Cheers, Ryan.

daz1968

iTrader: (13)

I think you mean downpipe, and should be ok for mot with just that in place, or try to find a helpful garage to MOT it for you

ryan_gwa

Yeah downpipe, thats what I would usually call it, but up-pipe seems to be thrown about here alot?

joz8968

iTrader: (13)

lol. When I first heard of the 'up-pipe' I too wondered what the hell it was.

The up-pipe and downpipe are two different sections of the exhaust system... Up-pipe goes from the headers' collector union's flange to turbo's exhaust inlet flange, so the gases travel 'up' (because the headers are below turbo level) to the turbo to spin it, then out the back of the turbo and 'down' the downpipe... Or... the nomenclature could have derived because the up-pipe is 'upstream' of the turbo, whilst the downpipe is 'downstream'...