A header pin so i can be tuned?
Wouldn't a wideband O2 be more useful.
Or is this header pin allow you to actively retune the chip on the ECU and what else would you need to do it?
The only problem is the guy is most likely running a stock motor, and I have never been font og those ridiculously high rev limiters that people chip and ECU for and sell them to people with stock engines. The stock valvetrain is not meant to rev that high, nor is the compression, much less a camshaft setup there to assist in getting that power the chip was designed for.
I just laugh at the people that buy them and think one day the higher their engine revs the more power it makes. Then destroy their engine doing something stupid.