How to determine cat converter size?
 

Where can I find the engine code so I can get the correct cat converter size?

Or how can I get te cat converter size for my car, esctunning has it as 2.25", 2.5", and 3.0", which one should I buy for my car?

RE: How to determine cat converter size?
 

If you haven't tried searching, do so please.

oh, and there are lots of knowledgeable people in here, but I don't think they can memorize or foresee what car all members have, so please, post a year/model... 1.8t? 2.8? y'know, at least the basics.... so everyone has somewhere to start from...

RE: How to determine cat converter size?
 

None of those are direct fit for OEM exhaust systems.

what make you think you need a new converter?

RE: How to determine cat converter size?
 

2.25", 2.5", and 3.0" pipe diameter size not catalist size ya gotta laugh aint you;)

RE: How to determine cat converter size?
 

People, bear with me, two months ago, I don't know shiz about car, but two months later, I learned a lot about car, but I still have a ton to learn, so bear with me, and help if you can. Thanks

so, 2.25", 2.5", and 3.0" pipe diameter size, how do you determine what pipe diamether size I need, or can I just use any, will it make any difference?

RE: How to determine cat converter size?
 

Because I got this engine code: P0421

RE: How to determine cat converter size?
 

What car are we talking about here, if we knew that we might be able to give you a more direct answer

RE: How to determine cat converter size?
 

that's a simple one p0421 is bank 1 catalyst ( that's the side where number one plug is on if its a V6 ) you cant make a mistake changing it because you can only buy the one for that side they are both different and include the front pipe as a single unit

RE: How to determine cat converter size?
 

I really appreciate all your reply, but I must admit that all your reply is useless to me some way or another.

So, are you saying bank one means the side on the driver's seat or the passenger?

RE: How to determine cat converter size?
 

I really need your guys help.

which size---2.25", 2.5", or 3.0" pipe diameter size is the correct pipe size for my car in the sig.