therock

iTrader: (2)

Well I have lost another cat. The 1st posted up here in 2011 was replaced free by GM.
Now 5 years later and out of warranty the GM 900.00+ replacement y-pipe and cats option is not pretty.

My local O'Riley's has a Magnaflow y-pipe and cats in stock under $500.00.

Just wondering if there are any kind words on the MF Cat line.

Thanks

FFDP

iTrader: (2)

It would be cheaper to just have some welded into the stock y-pipe. Would be worth a shot to hit up a exhaust shop and see what they can do for you.

Magnaflow work but often the cell count is way less than factory and on some vehicles cause a rear o2 code for saying the cat isnt working enough (P0420). Not saying that this will be the case for you.

therock

iTrader: (2)

Thanks, I'll hit them up.

01ssreda4

iTrader: (87)

Ive used them as weld in replacements with no issue. Will pass emission tests too.

gamble686

iTrader: (3)

Cats? Never heard of her. Lol
I say cut em out and tune them out.

Tig

iTrader: (2)

Cant go wrong with MF high flow spun cats. I've used them on several other vehicles with zero issues from inspections/sniffers.
59956 for 2.5" or 59959 for 3"

terravast4

iTrader: (25)

i run the magna flow 3" . if you are boosted i would run them a foot or so past your collector or you will destroy them. also if you are running too rich i believe that can burn them up too

mikeskiw

I just installed them on my Avalanche. So far so good, not codes but it has not been to a smog test station yet. They are not legal in California, most places won't even ship to California but I found a guy on Ebay who shipped them to my front door. I also installed the full Magnaflow full catback 3" mandrel bent pipe and straight through muffler. Quite happy with the results.