would the cat on my 89rs 305 be a 2 way or 3 way cat? is there anyway to tell?

 

A two way cat is:
Inlet, Outlet only

Three way cat is:
Inlet, Outlet, and an air tube on the side.

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George P. Lara
1994 Z28 LT1 T56
1984 Z28 High Output
Member: SCCA, SCFB, SC3GFB

 

in jegs theres super convertor brand cats that are 3 way and 3 way with air

 

I believe the 2 and 3 way designation refers to how many pollutants they convert. IE if it has 3 catalyists or 2. I don't know which one of the 3 is left out w/ a 2 way converter. 3 way doing carbon dioxide, Nitrogen whatever, and HydroCarbons.

I could be totally off base but I did read this somewhere.

It is not regarding the presence or not of the air tube for sure though...

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray