ty50n

Hi guys,

Just got my Scooby but nowhere near loud enough. Wan't to decat it but not sure of the exhaust setup and how many cats its has.

Can anyone help?


Cheers
Sami

JDM_Stig

iTrader: (3)

Why two threads?

Beastie

iTrader: (2)

Saloon or hatch?

Beastie

iTrader: (2)

https://scoobyparts.com/subaru-impre...9v6im9fli6jah1

Theres a start :-)

Beastie

iTrader: (2)

https://www.rallysportdirect.com/brand/invidia

I would be looking here though

Don Clark

A bit closer to home
https://www.tarmacsportz.co.uk/brand....html?cars=151

ty50n

Saloon, thanks for response

ty50n

Thanks Beastie, but I'm only after a Cat delete...

ty50n

Hey Don, I only want to remove the Cat not entire exhaust.

Cheers

Don Clark

So on your "other thread" you now say "already got nice back system".
So what is this 2011 WRX STI ?? and back system?

If it's a 340R you will only have one cat plus Pro-R/Scorpion back boxes, if it's standard or 320R you'll have 2 cats as usual.

I've been running mine for the last 9 years with both cats retained and an H&S cat back system at 340bhp/360 ftlb (Subaru 340R map)
Plenty loud enough and MOT friendly.

ty50n

It's a Subaru WRX STI A Line CBA-GVF

Don Clark

So JDM....(would have been helpful up front).

In that case your "second cat pipe" (44611AA460) may not be a cat.....

Further checks suggest it is a cat
Depending upon vehicle "revision", C or D, it may be part number 44611AA720 which also has a cat

ty50n

Yeah it's an import.

So meaning I should only have a cat on the downpipe right? And theres only 1 downpipe?

https://www.ebay.co.uk/itm/JAPSPEED-...UAAOSwFnleXkRK


Sorry new to Subaru


Thank for the patience.

Don Clark

See updated post above.

Janspeed downpipe would replace both.

The A-line is also a 2.5L engine so will have all the problems that the UK cars have re: Head gasket failure and broken ringlands

ty50n

Its only done 30,000 km and i bought to sell so wont be keeping to long.

Managed to get a pic of the underside

Don Clark

HKS Legamax Premium


https://www.hks-power.co.jp/en/produ...ffler/db/12739

ty50n

Wow! Great find!!!!

Beastie

iTrader: (2)

Then based on above you only have a cat in the downpipe. You need this for MOT.

To make it louder you could fit a straight through instead of the resonator box.

I would expect as it’s HKS it must be fairly loud already.

ty50n

Non of my cars would get through MOT without friends in high places