The Rig

iTrader: (13)

Is it the up pipe that has the CAT in it, thebit that goes from the bottom of the turbo down to near the gearbox area ?

any pics of what i need to buy anyone ?

im hoping i wont need to remap the car if i fit a decat, it has a standard air filter,dump valve,aftermarket exhaust (HKS Backbox with what looks like stainless steel from the gearbox area back to backbox)

cheers

Scott.T

iTrader: (2)

The Cat is in the Downpipe on that MY.
The Downpipe runs from behind the turbo, towarss the bulkhead. Then down alongside the gearbox.

projectsubaru

2 cats in the car one in the downpipe as mentioned get a 3" downpipe from someone reputable. Also a cat pipe connected to this then you will have the HKs attached to this by the sounds of it. Best is to do as many mods as you can before you remap it then you will get the best from them, ran mine without a map for a while totally decatted but its wise to get it remapped ASAP

Scott.T

iTrader: (2)

Remap not required, but doing so would get the best out of it and allow you to run a little more boost.

The Rig

iTrader: (13)

cheers for replies,isnt it 1 cat for imports, 2 cats for uk models ?

i want to stear away from a remap as i will need to buy an ecu and license etc etc and dont have £750ish spare at the mo really,wanna do subtle mods that dont require remaps at present.

cheers

The Rig

iTrader: (13)

something like this then,hayward and scott ?

Jay m A

iTrader: (2)

That would be a very good choice.

Yes, just one cat in the downpipe for imports, another in the centre section if its a EU model

And you can get a remap for a lot less than 750 on your car, even more value is a universal scoobyECU type one if a decat and filter is as far as you want to go (for a while!!)

Scott.T who has posted on this thread is well worth talking to ECU wise

The Rig

iTrader: (13)

cool,cheers.

is there a sensor in the original downpipe that needs messing with,think i read somewhere ?

so,with that hayward and scott decatpipe,anything i should ask about it, its 2nd hand,from an RA.

CHEERs

The Rig

iTrader: (13)

one last one,will that pic/decat make fit my WRX without any hiccups,aaprt from sheared nuts etc, the flanges/mating parts willmatch etc, as again ive read some stories

cheers

Jay m A

iTrader: (2)

Not the H&S ones.

The downpipe will have a thread for the lambda sensor, but yours is located in the headers. So you will have to buy a M18x1.5 bung to plug the hole. A quick fix is to use a Pinto spark plug, its the same thread size.

The downpipe you remove will have a wire coming out of it, just trace it bact to the connector and unplug it, there won't be any error code etc - its the 'cat on fire' temp sensor so it won'r be needed anymore.

That about it, other than if you want you can move the lambda sensor from your headers to the downpipe and put the bung in the headers, bur be warned the only reason for doing this is for longevity reasons - but you run the risk of breaking the sensor upon removal! IME its best to leave it, then once it needs replacing put the new sensor in the downpipe.

HTH

The Rig

iTrader: (13)

cheers,thats set my mind at rest.

thanks all/Jay

madmooro

i ave a 95 wrx wagon and it had a cat in down pipe and also one in the mid section

so it not only uk models that ave that ,as mine was a import also

look underneath ya car mate ya will be able to see me

speedy steve

think the "bulge" in your mid pipe is just a resonator & not a CAT, my95 imports definately only have 1 CAT & its in the downpipe..

2nd the vote for a scoobyecu or ESL postal chip ( basically the same thing ) when decattin makes a huge difference for less than a couple of hundred squids
no doubt not a good as a real ECU & remap but a fraction of the cost...

The Rig

iTrader: (13)

what about a group N 2.5" decat for a classic ?

why are some 2.5 and some 3" diamter ?

cheers

jaytc2003

iTrader: (1)

have a look at a tsl grp a decat downpipe

you wll be better off with the 3 inch now as unfortunately you are on the slippery slope that is scoob tuning and you will only end up changing a 2.5 later on!!

The Rig

iTrader: (13)

o.k, cheers.