This thread might be of interest:
https://www.6post.com/forums/showthread.php?t=1658085
Ask the OP how they've been holding up and see if he still recommends.
You'll need a tune to clear the SEL; I've heard people using O2 spacers in other vehicles to clear the light, but I'm not sure if/how that would work on the M6
very sensitive system.
- Leo.