johnnyroper

i have got a 2004 wrx and i know there are cats in downpipe and centre section,but is there also one in the up pipe?

cheers in advance for any help

53

iTrader: (41)

Yes there is.


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johnnyroper

cheers for that looks like i will have another cat to chuck in the bin soon then

funkyspider

Removing up pipe cat will give you issues with EGT sensor on a newage WRX. Even if you get an up pipe with a sensor boss the OEM EGT sensor wont be any good in there due to increased temps.

You can either relocate it into the downpipe which may mean drilling and welding a boss, or getting a downpipe with a spare boss fitted (if you can ?). Or you can remove EGT altogether and 'fool' the ECU into thinking its still in place and giving a valid reading by using a 2.2k Ohm resistor in the connector.

Removing all the cats will need a remap otherwise overboost is likely and possibly running lean, or having the ecu compensate on a newage and actually loosing some power.

Its well worth doing though.

green un

dont chuck em take em down ya local scrappy £30 to £35 a piece.

johnnyroper

i have already got 2.2kohm resistor in egt plug, the sensor failed a while back and i did not see the point in changing it.

i am removing all standard cats and just having 1 sport cat in centre for mot purposes,iam getting remapped once i have sourced all the parts and fitted them probably by jgm simon as i have heard he is very good.

down local scrapper with the cats it is then if i can get £30-£35 a piece

Nich B

Thumbs up for Jolly Green Monster

Nich B

funkyspider

Spot on, just thought I'd add my 2pence worth as lots of ppl think they can just whip all the cats off and turn their car into a popping and banging ferrari beater for 150quid