lambda sensor
 

hi guys i need help . i have a ver 1 sti my 94 ,now looked on the search for where the sensor is and i can only find one that is on the bottom of the down pipe ,on all the threads it says it is a 22mm nut but on mine it is a 13mm nut ,the new one i bought is a 22mm nut so will this fit and also have i got the right sensor on my car .

thanks for any help asap as the car is on the ramps at the mo

the one you have found is an EGT sensor (13mm), try looking in the exhaust manifold on the turbo side at the bootom