Hi!

I just bought a 2001 USDM ITR cat, I want to know if I got screwed by the guy...

Is it round? do it have the same intlet size as the GSR? 1 7/8" ?

The size of the one I bought is similar to the size of the resonator on a stock USDM ITR exhaust...

please help

 

It is round indeed and has a very small inlet size too.

 

Thank you for your answer!!

I have found this... and it's pretty interesting...


CATALYTIC CONVERTER FLOW RATES

All the measurements were done at 28 inches of vacuum.

1) Catco (metal core) 2.25" 223.8 cfm

2) Catco (metal core) 2.5" 271.9 cfm

3) Catco (std. core) 2.25" 338.2 cfm

4) Catco (std. core) 2.5" 388.0 cfm

5) Random Tech 2.25" 297.1 cfm

6) Car Sound 2.25" 342.7 cfm

7) Test Pipe 2.25" 407.1 cfm

8) Stock NSX 242.1 cfm

9) Stock Type R 223.6 cfm

10) Stock Integra 218.3 cfm

 

too bad there isn't one for the random tech and carsound 2.5"..