I am also considering to change the exhaust system on my 2002 JTS to a Supersprint system, but it appears that there is much difference in the exhaust systems of phase 1, 2 and 3.
Phase1, 1 cat 1 lambda sensor in front of the cat
Phase2, 3 cats (2 in the manifold 1 after the manifold) and 3 lambda sensors (2 in front of the cats in the manifold and 1 after the 3rd cat)
Fase3, 2 cats (2 in the manifold not shown) en 4 lambda sensors (2 in fornt of the cat and 2 after the cats)
Can anybody tell me why the "main" cat has been removed on my car model? My car has only 2 cats in the manifold and 4 lambda sensors (2 pre cat and 2 post cat)
I have searched the web, but is seems that Supersprint does not have a cat replacement for a JTS.
I noticed that my exhaust sustem does not match EPER
When I look in EPER I see the following 156 2.0 JTS '02:
no 1 and 15 are cats, however I do not see how to assemble pos 15 to pos 10...
However I only have 4 lambda sensors and 2 cats in stead of the shown 5 sensors and 3 cats (4 sensors in the first 2 cats , 2 left and 2 right, 1 after the next cat).
When I look at a GT JTS, it looks more like it:
no 2 is a flexible joint.
As far as I can see it looks like the Supersprint cat replacement is a substitute for the 3rd cat (POS 15).
Are there any more JTS owners who have a exhaust system such as mine?
Does anybody have experience with a high flow sports cat in a JTS?
What to do when I remove the manifold and replace it by a Supersprint system?