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MannyFresh570 10-05-2012 06:29 AM

Stock catylitic converter to hi flow
I'm getting a catback exhaust for my car as well as headers and while I was doing some research I figured I may as well get rid of the stock catalytic converter and use a hi flow but when searching for one I don't get dimensions so does anyone know if this hi flow would work?

This is the hi flow converter

This is the stock converter I have now

This is the catback ill be installing

So if anyone knows and has an answer it would greatly be appreciated thank you!

BrandonJ 2001 GT Limited 10-05-2012 08:49 AM

Says direct i wouldn't see why not.

octain11 10-05-2012 08:53 AM

was about to post the same thing, havent seen magna flow high flow cars before....

MannyFresh570 10-05-2012 10:13 AM

Yeah that's what I thought I just don't want to buy it and then it not fit. But thanks I needed some reassurance.

And yeah that site has more of a selection of aftermarket parts for our generation legacy. They relatively cheaper too!

BrandonJ 2001 GT Limited 10-05-2012 11:09 AM

I think I'm leaning towards a track pipe and removing the CEL bulb :lol:

octain11 10-05-2012 11:11 AM

thats what i have now, full straight pipe in the middle without resonator, but do have a stromung high flow. that wouldnt be too smart removing that bulb :lol:, you get used to it. but i check it with the reader every few weeks to make sure i dont any real issues

rougeben83 10-05-2012 04:00 PM

that magnaflow isn't a hi-flow unit, just an OEM the part no. to check yourself.

octain11 10-05-2012 04:54 PM

+1, thats just a single cat, if your going to run a CEL might as well make it a straight pipe of high flow

MannyFresh570 10-05-2012 11:25 PM

That makes sense. The site is misleading as far as that goes then. Looks like there is no high flow cat really then. Thanks

octain11 10-06-2012 06:19 AM

there are high flows available for our cars

Tizzles 10-24-2012 10:55 AM

Its a high flow cat thats direct fit... i.e should just bolt in

Bassnectar 10-27-2012 11:27 PM

get a high flow cat based on the size of your exhaust,

Ie i have a 2.5 inch catback, I am getting a 2.5 inch high flow cat and having it welded into the catback.

if the magnaflow one is the one I am thinking of it includes the tubing that's not really necessary if you know someone who can weld.

firebox40dash5 11-01-2012 05:44 AM


Originally Posted by Tizzles (Post 4128624)
Its a high flow cat thats direct fit... i.e should just bolt in

No, it's not. It's an OEM style replacement. No sense in the OP buying it, unless the factory cat is clogged.

I had a single high flow in my old WRX, it was an improvement over the 2 factory ones (uppipe cat was removed before I bought it), did set off a P0420 without tricking the rear O2 sensor though. Dunno if it would do the same replacing just one cat, rather than 3. You can buy one cheaper than that Magnaflow too.

sunny_d 11-01-2012 09:40 PM

Test pipe, with a resonator. Sounds sexy... then just get a turbo! My DSM had 3" straight pipe turbo back with only 2 resonators and sounded amazing

grovlet 11-11-2012 09:03 AM

Just go to your local exhaust shop and have them fab up an exhaust....

My entire Header Back was $650 out the door. (High Flow Cat + Magnaflow Muffler + Piping & Install)

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