Best Cat Converter To Use?

[paul_psi]

Thanks mate the test is a IM240 meaning a 240second test he said worst case I'll have to change the cams and injector then should be sweet and a very mild tune he is most worried about raw fuel in the exhaust one drop and I'll fail straight away

[paul_psi]

Any ideas where I can get a 4 inch euro3?

[scotty nm35]

Any ideas where I can get a 4 inch euro3?

There are euro 4 cats about now, not as cheap, but you have a much better chance of passing with one of them fitted. You can get them through Super cat, the Magnaflow importer in Melbourne. They also sell the euro 3 metal cats.

[paul_psi]

Cool thanks I'll see if they have them in 4 inch

[SiR_RB]

Decat is the best cat haha

[scotty nm35]

Cool thanks I'll see if they have them in 4 inch

4 inch inlet, or body? If you want a 4 inch inlet you will need to cut back the inlet of a 3 inch I think.

[abr33]

As iv said earlier a bf xr6t will have your rb running euro3 standard.

The substrate is about 120mm diameter and 300 long. They work very well. Cost me 100 bucks.

On a side note iv got a xforce 3.5" s/s cat coming. Apparently they are the go

[scotty nm35]

The XR6t cats are single 3 in and twin 2.5 out, not something that would easily bolt into a Skyrine.

[paul_psi]

I need 4inch inlet out let. Im making a 4 inch exhaust

[scotty nm35]

With that kind of flow requirements you will need twin 3 inch 100cpsi cats at a minimum imo.

[paul_psi]

It's only to pass epa so I'm thinking euro3 with 3inch inlets I'll just reduce the 4 inch exhaust before the cat and I'll change it to a venom or whatever after iv done the test I'll just have vbands before the reduces I know it's a stuff around but need to past the test

[scotty nm35]

I would run a stock exhaust for test, with 2 or 3 stock cats, just to make sure it passes first time.

How do you expect to get a 4 inch system past the noise limits?

[abr33]

The XR6t cats are single 3 in and twin 2.5 out, not something that would easily bolt into a Skyrine.

The one I have is 3 in 3 out

[paul_psi]

I would run a stock exhaust for test, with 2 or 3 stock cats, just to make sure it passes first time.

That's what I said to the engineer and he said that it doesn't make a difference he said just get 1 euro4 and I'll be fine aslong as there's no raw fuel

Iv got a 4 inch to 3.5 inch back to 4 at the moment with 2 mufflers and it was 85 dbs the limit is 90 dbs so I can't see the extra .5 inch for half a metre making it 5 dbs louder

[paul_psi]

The one I have is 3 in 3 out

What model xr6t?

[scotty nm35]

Iv got a 4 inch to 3.5 inch back to 4 at the moment with 2 mufflers and it was 85 dbs the limit is 90 dbs so I can't see the extra .5 inch for half a metre making it 5 dbs louder

What mufflers are you running? That's pretty good for such a large system...

[paul_psi]

They are the large oval hurricanes

[scotty nm35]

I have had issues finding good 4 inch mufflers, there aren't many online. I usually use Magnaflow but they aren't what I would call quiet.

I didn't know Hurricane made mufflers that large, I will have to get in contact with them. I would assume they only do mild steel though?

[paul_psi]

Yeah mine are mild steel I just had a close look at them they might be 3.5inch with 4 inch welded on looks a bit sus

[abr33]

What model xr6t?

Pretty sure its bf, what ever was the newest in early 2011 late 2010