2003 M3 6MT Slicktop
Lol never said it was meant to be professional, just a fix. So far all the issues i had with my car are gone. No more thump and it actually goes into gear smoother. Professional is like 4500 .This is like 30 bucks for the screws ,plate washers and bolts.
well to be fair a $4500 fix is when they cut out, and weld in a whole new floor panel and it's better than new with warranty from BMW.
you really need to be sure that bolt you're now using is a high strength Grade bolt. it appears to be a cheap grade bolt.
but this is something i posted about like 7-8yrs ago. here is my thread on a shop doing this years ago.