gun5l1ng3r

I live in Califoria and need to replace my catalytic converters and was wondering if all catalytic converters are the same. How does a CA/OBDII compliant cat differ from a generic catalytic convertor?

Thanks for the help!

-Jake

WILWAXU

iTrader: (6)

From my understanding, in California, the cats must be replaced with factory replacements on OBD2 cars. Anything else will not pass visual inspection.

Call a local muffler shop to clarify. If your in San Diego, I can recommend one.

gun5l1ng3r

I am close to San Diego(San Clemente, . Beyond the visual inspection, does the CA/ OBD2 CAT modify the exhaust stream in a different way than the generic CATS?

I know that CA/OBD2 cats have special parts numbers printed on the outside of the cat, but who the hell climbs all the way under the car with a flashlight and magnifying glass to read the numbers on the bottom of a dirty exhaust part? I just had my car smogged and the guy looked under the car for the CATS being in place, but he did not compare any numbers to a sheet or anything of the sort. They are stock cats though.

Redneck Z

iTrader: (3)

The magnaflow/carsound cats have a CARB E.O. # for some LS1 engines, but not the f-body. They are stock looking and kind of in the gray area. I've got them on my car and doubt they'll be a problem. They look like a stock style cat, and most probably couldn't even tell they are aftermarket. The magnaflow's flow well and have almost twice the holes per square in. as the stockers.

gun5l1ng3r

What would having twice as many holes/ sq in have to do with anything ?

gun5l1ng3r

What would having twice as many holes/ sq in have to do with anything ?

Redneck Z

iTrader: (3)

Thats the prime reason they are higher flowing than the stock ones. More holes in the comb=more air flow. If the ceramic piece had no holes, they would flow nothing. Get what I'm trying to say? The direct replaecment ones also have a smoother pipe, inlet and outlet design.