powerflow are making me a decat for my 172mkII. They are just cutting out the cat and welding in a bypass pipe between the two lambda sensors. (i have bought a cheap original cat for MOT time)
My Two questions / problems are:
1. does this sound like a feasible thing to get done?
2. should i get them to leave both lamda sensors in? or shall i get them to cut the hole for the second one out along with the old cat and unplug the second one from its connector?? so i just have the upstream sensor and then the bypass pipe with no space for a second sensor?
Reading this post back to myself i probably havent explained myself very well, but i hope it makes sense so that someone can help