hi there where would you put a cel fix on a 01 wrx thats decatted. would it be on the down pipe sensor or in the centre section(not sure if there is a sensor here) thanks. it would be a screw in extension type not an electrical one.

 

up

 

Thought you could just have this mapped out mate?

 

its on the exhaust depending what pipe u have, either bottom or down pipe, or just after the down pipe, the lambda sensor will be there, u unbolt it an put the extension piece there an bolt lambda back in