TWOSTROKE PIPE REPAIR with WATER: how it works, what works and what doesn't

Bent and smashed twostroke offroad pipes are a very common thing. Most people fix these pipes with heat and air pressure. In some videos they get fixed using water and a powerwasher, but no video explains how to do it. I DO EXPLAIN HOW TO USE WATER TO FIX THE PIPE! At least I found out about it, how it works, how it doesn't and what it really does.