You need to slow down and read, I posted this just above:

Now, more specifically, back to your question:

A cat is not a ubend- so no, if you buy a new cat and replace your cat as is, then you still have a ubend and an otherwise stock downpipe. Sure you could have an exhaust shop do a ubend delete while they're installing the cat, there wouldn't be much extra work to it- but many shops are VERY against doing them for some reason (liability of the O2 sensor getting snagged on road debris I assume).

Does what one bolt on? You didn't link to anything, or give us a clue what we're looking for. Assuming you're just going to call up Magnaflow and buy a cat- of course it won't bolt up- the factory cat is welded in as part of the downpipe assembly. So obviously you'll have to get your cat cut out and the new one welded up.

Personally, I wouldn't waste my time- you're not going to gain hardly any power- its not a real big restriction unless your factory one is plugged.

 

I knew you would, ! What caused my PCM to buy the farm was the Hypertech Power Programmer 3. I got the dealer's receipt to prove it. That's THE programmer I was TALKING about. I'll tell everyone and their mother-in-law not to buy one, but that's MY opinion from MY experience. I now have HP tuner and I'm very happy with it.(Although I'm still learning how to use the thing).

 

No need to get worked up, I'm sure yours did fry the pcm- I was just saying that not every tuner/programmer is going to fry your pcm.

This is what I mean:

And hence why I always say I'd avoid any programmers except the proven ones like DHP or HPT- instead of making a blanket comment about all programmers being bad.

 

! Not worked up, but making sure my spelling was correct. I have problems translating from Spanish to English at times and getting my point my point across can be trying sometimes.

 

okay well the cat im looking into has a plug in for teh o2 sensor and isnt the o2 sensor in the u-bend? so uh im kind of confused.

 

In the picture you can see where the O2 sensor gets screwed on. That section is straight. That's where the U-bend used to be but in this DP it has been deleted.
http://www.partstrain.com/store/deta...on=Driver_side

 

I bet he's looking at that crappy universal downpipe that magnaflow has their name on.

 

no its not "crappy"! it was a direct fit oem replacement that was dicontinued. and to you montyss02 thanks for the link very helpful.

 

Hey man, no sweat!

 

If the cat you're looking at has a bung for an O2 sensor, then it is more than just a cat- its either a cat and ubend delete (which I've never seen for our cars- a part that just replaces from the cat to the rear downpipe flange)- or its a complete downpipe.

The thing in the picture posted above is a complete downpipe. If you were to buy just a cat as you were saying, this is all you would get: