Catalytic convertors?

[Legoman]

in this picture ive attached , do these look like catalytic converters?
also ive been told the lambda sensor is on the downpipe before these so if i have a system made without the convertors (removed as cars a J plate) it wont effect the sensor as its taking readings before the convertors? (if thats what they are ofc).

 

[television]

Yes the is 2 of the CATs dont worry about the sensor it will still work. My sl got through the MOT with 2 removed on the V6