Hello guys. I have an oldtimer and I was advised to add a broadband lambda indicator to me for carburettor tuning. However, since I have no room for the screw in the engine compartment after merging the cylinders and the further strand runs outside the car (I have sidepipes), the probe would be like a fungus on the pipe. This makes the probe sensitive to shocks and also looks good. Can I save myself the drilling in the exhaust somehow and the values a measuring at the end of the exhaust? Maybe you can build a small pipe into which you install the probe and which you can insert (about 15 cm) into the tailpipe. Does this work? Or are the values at this point no longer (reliable) measurable? If the TÜV makes the exhaust gas control, it also measures on the exhaust, right? With carburetor engines without cat there is no “before” and “behind”. I searched the net and in the forum, but found no really usable information.