CAT Converters (Eastern or ?)

[drick37]

Okay, I stil have P0430 code after I tuned her up, changed all 4 O2 sensors and checked the fuel pressure. The code is still showing that the right bank catalyst is incorrect. I am either about to take it to the dealer (rip off) for $1350 in converter work or order the Y-pipe on-line (Eastern for $400 or Magnaflow for $500). I wanted to know if anyone here has replaced their CATS on a 5.3 2004 flex engine and what CATS did you use or recommend if they did not eliminate the p0430 code?

[chris peter]

I had a P0430 bank 2 on my 99 Tahoe 5.7 I install a Magnaflow cat from O Reilly’s Auto Parts $336. The original cat on bank 2 was broke into 2 pieces inside I’m still wondering if it plugged up the mufflers because every now and then I hear noise from the muffler. I did install 2 new upstream O2 sensors just as preventive maintenance. No more P0430

[drick37]

Thanks, I got two Magna flow 99066HM, but was told by a couple of different shops that they cant weld them in. I have to return and buy a Y pipe. I'll install myself with the y pipe.

[chris peter]

The system I bought was with all new pipe. It was a complete bolt on sysytem for $336. It bolted to the factory exhaust. Piece of cake to install. Dont fool around with cutting out the old cats and installing new ones your time is worth more than that.

[drick37]

I'm shipping the Mags back today and ordering the Eastern bolt in. Thanks for the advice.

[MT-2500]

It might be wise to make sure the cat is bad and if bad find out why it went bad.
Many things can give a cat code or make a cat go bad.
What year and how many miles on it?

[drick37]

Bad O2 sensor in bank 2. Replaced all of them, but the damage was done.

[drick37]

Sorry, 2004 Tahoe, 5.3 4x4 with 95k. Flex fuel.