I have been blessed with code P0420 on my 98 D1. My question is should I replace both cats at the same time? I will probably weld in some high flow magnaflows or something of the like. I just dont wanna have problems just doin one side without the other. Any input is appreciated.

Thanks in advance
Brian

 

I would do both, but that's purely because I like to do things in pairs( figuring if one is gone, the other is prob soon to follow)

 

2x on doing them both .......at the same time, a little more trouble now, a lot less heartache later.

 

X3.
You will get better flow on one side than the other and she wont like that.

 

x3 on both. You want the same performance on both banks.

dang it, Spike beat me....x4... =(

 

Yeah i guess ill bite the bullet and do both of them. That or move somewhere that doesnt have emmisions lol

 

Almost forgot......does anyone know of a good source or brand to get???
I have no problems running universal ones I just dont want to dump the big $$$$ on the whole Y pipe

 

I have Magnaflow universals that fit our trucks. Doesn't look like they will at first, but they do. Check out their website. They even have a list of dealers. I got mine installed for about $275.

 

Good deal i'll have to check them out.......I'll probably install them myself(just gotta new millermatic 255 i need to try out)

 

http://www.discountexhaustsystems.co...universal:0%29