i was wondering if i put a catless tbe on my 05 sti if it would throw a cell bc of there being no cat...... i really want to know if they aps 3.5 tbe does this and if there is anything i can do to not have that problem... the invidia catless tbe says it utlizies the 02 sensors where it want do it just wandering if aps did the same............

 

so all 3 inch catless tbe wont throw a cell????if not which ones wont..besides the invidia