Yesterday, I deleted header cat,mechanic made it in 4.5 hours. Then I went to the electrician and he hooked me BMS DPfix. No errors, I hope will not appear.
The sound became a little louder. But here's how to write an additional 15-20 were added and I feel it. On the dyno I'm going later when i choose which tune to do.
Total cost 390$ (cat delete 260$, 120$ BMS and 10$ to install it)