Bar

Im confused....

http://www.haywardandscott.com/subar...-cat-pipe.html

Quick Overview

The 2.5" cat pipe replaces the 2nd/3rd cat on a New Age Impreza, which can be removed without messing up the ECU and is still MOT friendly. 2001 - 2005


So you can remove the second cat without needing a remap?????

bigbruiseral

iTrader: (1)

yeah this is the one connected to the down pipe

jf_wrx_2004

Yer I'm pretty sure u can m8 it's when u change the down pipe things can go **** up.

mogs132

hi yes ive done this mod the second lamda is at the end of the downpipe before the second cat so 2nd and 3rd cats can be removed without a problem and without management light on

53

iTrader: (41)

You can but on the Hawkeyes they can still get upset and over boost even just changing the second cat pipe

Bar

Oh really! So it would be better to just remap when removed anyway just to be on the safeside.

Another question, see if I got a decat downpipe and then the 2nd cat bypass pipe, come MOT day would I pass the MOT with just putting the 2nd cat back on rather then trying to access the bellmouth and putting the standard downpipe back on..the latter could be a nightmare.

If that is the case then ill not bother with a sports cat and get the H&S items:
http://www.haywardandscott.com/subar...-downpipe.html

and

http://www.haywardandscott.com/subar...-friendly.html

53

iTrader: (41)

Yes

No

I have the H&S sports cat and it passes everytime

Bar

Excellent, thanks for the info so far!

What power difference did you get from going from standard to sports cat? Is it a 100 or 200 cell?

Sorry for all the questions!