exhaust system Impreza WRX cat Exhaust advice required

[Seminole81]

I've got a JDM cat back system...just need a downpipe or cat. Should be able to grab one second hand for cheap.

[savage bulldogs]

Its still a lot of money for a full system including sports cat ,i only needed a cat back .

 

Do you definitely need a whole system ?

 

[annascoob]

No don't "need" the whole lot only centre and back but thought seeing as doing most may as well do it all and stainless should last! So that's why looking at downpipe too ; but also the quandary of where the cat is? As if not in centre, or back then needs to be in the downpipe hence looking at that - my garage mech is a by the book type too so would not "play with emissions" and being Devon not to much choice of garages either. 

This is the system we are looking at: http://cobrasport.com/index.php/cobra-sport-exhaust/subaru/impreza/subaru-impreza-wrx-sti-107/road/subaru-impreza-turbo-turbo-back-system-with-sports-cat-resonater.html

Should be a link there for Cobra sports exhaust turbo back sports cat and res. 

Seminol89 - is that JDM as in the garage (which is situated in Devon, highly unlikely or JDM American brand? 

[savage bulldogs]

 

If there's nothing wrong with the standard cat in the downpipe maybe just by a cat back for now . It will unleash the Scooby sound , be cheaper and only take about a hr to fit .

 

 

Afaik the bug wrx has a pre cat in the up pipe (just before the turbo) and a main cat in the downpipe (like all model's of scoob) .

 

 

When getting a remap ,most change the up pipe for a sti up pipe or aftermarket 1 without a pre cat . This helps spool and power but needs to be "mapped in" to work .

 

 

So id probably leave the standard downpipe insitu until a later date . Then change both up and downpipe at some point if you decide to unleash a bit more power (get a remap)

 

 

The likes of cobra,Haywood and scott,nur spec (loud) ect cat backs are available for about £200 2nd hand .As are the prodrive sports cat downpipe fitted to the prodrive ppp versions.

 

 

Jdm stands for Japanese domestic market , so the exhaust seminol89 is made by a Japanese tuner [emoji6] (which are normally good quality too but hard to find over here )

 

 

 

[annascoob]

Update on exhaust system. We brought and had fitted the Cobra 3" sports cat from turbo to tailpipe with NO remapping and what a lovely purr she has now! We have had issues with the engine management light coming on at speeds over 50mph (doesn't happen often because Devon road infrastructure so pants you rarely get over 40mph!) ECU thinks it's not getting enough oxygen but that has been sorted with an "elbow" cheat in the pipe so the ECU thinks it's ok now! Possiblely looking at a walbro fuel pump upgrade and then remapping; however may be some time yet as we are going to be a 2 Subaru household, I have converted he husband lol and we looked at an 2006 Forestor XT last week which he is buying! So now will be asking about Forestors too!