I have an 02 xjr. I know our cars use 4 o2 sensors. I'm looking to buy a supersprint exhaust(they currently have a sale). And their downpipes only have 2 oxygen sensor bungs. Is there any way for me to work around not having any codes?
Nameless sells high flow kittens, with 4 bungs. But I don't want them for 3x the price of kitten-less setup.

 

You can WELD 18mm 'bungs' into the 'after-cat' pipes and fit the less expensive units?

 

they’re charging like 500 dollars for a piece of pipe lol

at that point you might as well just gut an ebay special cat

 

Good point

 

On my 2001 xjr they deleted the 2 first cats, made a straight through 3” pipe instead from a piece of stainless steel and she has never had any issues , in fact even the emissions test stated 0.4 which is quite low for a 4.0S

 

The car only has 2 cats. Did they weld in o2 sensor bungs? You might be thinking of resonators.

 

it looks like the 2 downpipes have lambdas on them, one each side. The downpipes then flow into the bigger single through-pipe. There are no other holes as that was specifically made....
cheers

 

Keeping things stock would be my choice. Wrecking yards usually have parts that fit
and that are not so overpriced. However, that may be only in my specific area.

 

In the USA, the EPA has banned the re-use of used catalytic converters as replacement converters.

Salvage yards won't sell you one!

 

and there’s me thinking our dictator clowns were all about saving things, recycling, reusing, repairing…

 

My yards must not have got the memo....and I am not about to spill the beans!

 

I have several 'parts-cars' and I am NOT going to sell the 'cats' to recyclers. (I plan to use them if needed)

 

This is for an 00’ XJR from RockAuto but, I can say with just about 100% certainty that if these were installed on a bone stock car that the CEL will come on with catalytic efficiency codes. I think they should make used factory cats available to the public from junkyards. BS Politics!

 

It must be nice to have "several" parts cars. and...it is even nicer that you have room for several parts cars.

 

I have room because I live on a 'goat-ranch'. (they are not allowed to play in the 'salvage yard'/repair area of my shop)
I keep them separated.

 

Hahaha...I just had this mental image of a goat prancing around on the hood of a X-308.

 

Sometimes (once every few years) a young one gets through the fence and jumps up on a 'parts-car'.
They can climb and jump, especially when they are young.
I just turn my 'blue-heeler' dog out and run them back into the pasture.

 

https://www.summitracing.com/search/...tic-converters

I use converters from Summit. They have the best selection I have found.

When we increase engine airflow by 2x, we must increase the CAT size in proportion. Obviously the OEM converter will not work. The math is not difficult. It works every time, and all emissions perform correctly. We have never had any of the troubles many fear.