CRAP!!!! I think I bought the wrong cats!!!

Part numbers should be on the cats.

 

I think the early F355 had cats with only one O2 sensor...

 

Are they the same otherwise? If so just bring them to a muffler shop and have some bungs welded in.

 

Return them through Ebay. As a buyer, you have a LOT of power and the right to return if the auction was misrepresented. After you get your money, leave him negative feedback.
If you did this transaction outside of Ebay, then all bets are off.

 

Don't tell them what it's for and they shouldn't charge a lot. If you tell them what it's for the Ferrari tax will triple the price. You can even buy the bungs and just bring them to the shop. If you really want to make it easy drill the hole yourself.

 

A lot has to be considered before going that route. The location of the bung has to avoid hitting the catalyst core...also the location has to clear the car when installed...I noticed one of the existing bungs has fresh weld on it, like it was recently repaired? Not a good sign...

 

If you got them inexpensively enough, then may be worth the risk to add the bungs and see you can get them to work.

 

Yea I would weld the bung in the pipe near the thermocouple connection. This way you avoid the shield and you could drill it yourself.

 

Good lord. So what you are saying is "once the seller makes you whole be sure you leave him a bad review ~ just because you can" Is this what you truly advise? You would not by chance be one of those Google or Yelp reviewers would you be? Why wouldn't someone instead suggest to try to make things better - not worse? If the seller (who did not actually misrepresent these) returned the money in good faith why would you then turn around & give him or her a bad feedback? Think about that. Who is the actual problem in that scenario?

If the seller makes you the buyer whole (even though it was the lack of initial research on the buyers part) DO NOT leave that person a bad review. Sheezzz. Talk about using a review as a weapon. This is why on-line business reviews are bogus.

 

cat from a '99 360 Image Unavailable, Please Login Image Unavailable, Please Login

 

They look like the later model 360 cats. The upstream O2 sensor is on the exhaust manifold and the downstream O2 sensors are between the 2nd and 3rd cats just like in your picture. There is also a temperature sensor downstream of the 3 cat. These cars have a total of 6 cats, 3 on each side.

 

Not at all what I am saying (please do not make such wild assumptions and leaps of faith!) What I AM saying is if the seller is misrepresenting the product (lying) then it is your duty to protect the next buyer, by giving them a negative review. Just "making you whole" does not make the situation good. Without a negative review, you are allowing this seller to prey upon the next unsuspecting buyer. Now if they entire problem is a simple misunderstanding and the seller didn't exactly know what he had (cats are for a different model or different year), then yes, let it go, and simply leave no feedback (that could possibly be the case here, but the OP has said he felt the seller has been lying to him about other aspects of this transaction)

Example: I bought some cologne on Ebay that was claimed to be authentic. The price was very good, but not unbelievable. I asked the seller to confirm it was authentic, and he/she confirmed. Once it arrived, it was obviously counterfeit. I immediately requested a refund, and submitted pictures of the obvious differences in the packaging, as well as it smelled completely wrong. The seller refunded my money immediately, no questions asked, and didn't even request the product back. Did I leave him negative feedback? You bet I did, to protect other buyers from this fraudulent seller who had dozens of active auctions going on Ebay. The feedback system is there to protect us all from the liars and cheaters.

I have been active seller on Ebay the past several years and have NEVER had negative feedback...I currently hover around 1500 positive feedbacks from my buyers. The key is lots of pictures, and accurate descriptions. In the odd case when something goes south (delayed delivery, lost delivery or the rare occasion where someone is unhappy with the quality of the product), I always make my buyers MORE than whole. I will not only replace the product, but will refund part of their purchase price as a "sorry for the trouble". And if it shows up a bit later (usually does) I just tell them to keep it, no problem. I rack it up as a cost of doing business.

 

I have cats off 1999

 

I don't leave ANY feedback if the seller resolves the issue to my satisfaction.

 

See my post #16. I'd do the same....the difference is if the seller is lying or misrepresenting the item. Even if made "whole" again, the deception needs to be made public to protect other Ebay buyers...that is the reason for the feedback system. If one is silent, they are allowing the deception to continue.

 

they look correct, only the 99's have 2 bungs, adding the bungs is not hard to do.