Downpipe question

[SubiEj255]

The stock downpipe has a cat on it right? Would I get the same effects if I were to gut my stocker as getting an aftermarket one?

[EJ257]

The stock downpipe has a cat on it right?

Yes

Would I get the same effects if I were to gut my stocker as getting an aftermarket one?

No

[SubiEj255]

Why not? Size differences?

[MainFrame]

Size differences, and block off plate.. flat plate blocking the IWG exit is ghey.

[SubiEj255]

Is there a difference between cat and catless aftermarket ones?

[MainFrame]

Yes.. catless is less restrictive, therefore capable of producing more power (also louder). A catted downpipe will generally be more expensive because of the material catalytic converters are made out of. The advantage to catted would be that you would be more likely to pass a visual safety/emissions inspection, and in the later year models fully catless exhausts can cause boost creep issues where as catted downpipes seem to prevent boost creep (for the most part).

[SubiEj255]

Yea that was the ONLY reason I was considering a catted dp; for the visual emissions inspection. These cars only have one cat?

[UEDan]

2. You'll need both to pass a sniffer test.

[MainFrame]

2L WRX has three, 2.5L has two.

[SubiEj255]

Here in md they don't do the sniffer on newer cars.

[SubiEj255]

Where is the other cat? In the catback?

[Teamdiedrich]

The cat came back, the very next day.

[MainFrame]

Where is the other cat? In the catback?

In the downpipe (or midpipe if you get a shorty DP). The term "catback" literally means, from the catalytic converter, back.

[Sinister]

The cat came back, the very next day.

Repped... ruffles

[SubiEj255]

I know this is old, but no one told me where the 2nd cat was.