Best Catalytic Converter For A 32 Gtr?

[boobeedoobee]

Hi i have a full exhaust system installed by the previous owner and noticed that the stock converter is still there would replacing it give me much more hp and if so which is a good brand to go go?

[GTSBoy]

A big 5" 100 or 200 cell cat will give you a little free power, and open up the possibility of flowing a lot more if you add boost/turbo size, etc etc.

[boobeedoobee]

Bit odd how it's a full exhaust to the dumps but with an oem cat? Could it be that the oem cat has been punched through like a lot of people do?

[GTR-N1]

Sorry to state the obvious but you'll need to ask the previous owner or take it off and have a look. Is the rear bar coated with yellow residue?

[Dose Pipe Sutututu]

Bit odd how it's a full exhaust to the dumps but with an oem cat? Could it be that the oem cat has been punched through like a lot of people do?

To keep the rear bumper clean and/or previous owner had enough of the exhaust fumes

[Ben C34]

I use a pipe through my stock cat. With approx 45 degree bend at end of exhaust pointing down and no marks at all on the bar.

I wouldn't be suppose if your stock cat is hollow.

[boobeedoobee]

My rear pipe faces down.. and when I warm it up there is lots of black shit on the floor? Does that mean anything?

[KiwiRS4T]

If you have a stock cat it presumably bolts up so you can unbolt it in a few minutes and have a look inside. What diameter is your new exhaust system?

[boobeedoobee]

The exhasut system is a 3inch .. I think

[XKLABA]

I use a pipe through my stock cat. With approx 45 degree bend at end of exhaust pointing down and no marks at all on the bar.

I wouldn't be suppose if your stock cat is hollow.

That in NSW is an instant $10k EPA fine, cat was deliberately modded to not work

And for what, there is no gain from a 3" pipe to a working 5" bodied SS cat, 100 or 200 cell makes little difference

[Ben C34]

That in NSW is an instant $10k EPA fine, cat was deliberately modded to not work

And for what, there is no gain from a 3" pipe to a working 5" bodied SS cat, 100 or 200 cell makes little difference

Yep. I'm in adelaide though, and never known anyone to have any trouble.

I think it's pretty common here, which is why I mentioned it.

[XKLABA]

Haha, I just noticed he is in SA, so play on

[Piggaz]

Is that the actual law? I've never seen the clause of this "$10k fine" for a non working cat.

[XKLABA]

There's not working and then there is tampered with to make not work

A cat with no center could be argued poor maintance, a cat with a 3" pipe welded inside has been made to not work on purpose

And as much as it would be a hard one for them to prove it was you that did it it's not worth the legal battle for no gain in performance over a good quality high flow SS cat

Though I do think the full $10k is for a company vehicle