High Flow Cat for 04 Yukon XL

[Kingx1]

So im looking to replace my cats with high flow ones during my new muffler install. I found a few that were pretty cheap....around $80 each. Is it necassary to get an obd2 compliant cat or is a pre-obd2 cat ok? And any good suggestions as to which one i should go for? I was looking at the Magnaflo 54959 as a possibility.....would they be ok?

 

[Z28TWITCH]

If your existing cats arent bad dont bother messing with them...no gain in power and itll just rasp/rattle/pop more...

 

[Kingx1]

Not sure if they're bad at all but my truck has 174k on it and I'm pretty sire they're the original cats.

 

[01ssreda4]

Ive had experience with the magnaflow generic cats and theyve been good, even passing a sniffer type emissions test.

 

[Kingx1]

I'm gonna see about getting a pair installed wirhimg the next few months. Have other issues right now unfortunately

 

[Countryboy07]

Do you live in a place where they do the emissions testing? If not, I'd skip the high flow cats and go straight to long tubes and Offroad Y-pipe

 

[Tonyrodz]

If you're not getting a code, I'd just leave them alone. Spend money on something else.