hi everyone...ive been looking around for a stock catalytic converter for my S5 GXL... Unfortunately the only ones ive been seeing are turbo II cats...does anyone know if the turbo II cat fits into a NA...? thanks!!!

 

Main cats are interchangeable.

 

is the main cat the one with the tube that sticks out from the side and back to the engine?

 

yes,the main cat has the tube...the pre-cats are usually located after the manifold.small thingies..kind of cute little Puddy Cats!..lol!

 

Edit: they should be called:........Kittilytic converters..hahhahaa...argh groan..hello?,this thing on??..tap,tap..

 

LOL..thats pretty funny..makes sense also

 

btw..i heard there are differences with the S4 cats and S5...? something about port 5 and 6 wont open if you have the s4 cat into a s5? is this true?