ah ok your running a k04? im just a k03s dunno what the qpeng k04 pipe is like, only 1 weld on the k03 and looks pretty good. It has a lambda hole for the pre cat which is just after the flexi bit after it joins to the manifold, seems a bit close to the engine for my liking but guess it will do the job. Will see what Mr MOT has to say about it
I've mapped out my post cat lambda dont think it will affect anything its just there to check the cat is working properly.
I like the look of that cat tshirt2k posted! would need to cut the flange off though like he said, it looks like what I imagine the Hoffmann cat would look like with sleeves welded on its ends, which is what I was planning to do
If you go for it let me know what happens
