RJM25R

iTrader: (1)

Hi all,

Can anybody explain up/down/decat pipework please!!???

butler

Up-pipe is pipe from headers up to turbo, Downpipe (first cat on classic) from turbo down to centre pipe, centre pipe (2nd cat) to back box.

bighead

iTrader: (1)

decat means no cat in the pipeworks= more power

RJM25R

iTrader: (1)

i didn't know there were 2xcats...... which one has to stay in for mot? or is it either????

will up pipe give more power on it's own?
can you get an upgraded downpipe still with cat? expensive I assume?
my car has a prodrive rear box, but dunno what the centre section is or if it's de-cat or whatever?

bighead

iTrader: (1)

decat . to pass the mot go to a "freindly garage "if yr from oldham I reccommend Prosport in Battersea road , Heaton mersey , Stockport .
thet are Subaru approved garage as well
They are the best in Manchester and surroundings

rigga

iTrader: (4)

classics up to 2000 have a cat in the downpipe and midpipe if a uk version,jdm's (jap domestic market or imports) have only a cat in the downpipe and normally a resonated center section,newage onwards have cats also in the uppipes depending on spec,so could have 3 cats in total..... loosing all cats increases power but would benefit from remapping to take account of the increased air flow...... there are other issues but thats a generilsation.

serpico

Will they be lenient on the emissions? If so book me in!!