I went to local hardware store and got myself a MAPP-Oxygene torch (the same as the one fron Lowes). It burned so hot that actually I was able to get locally melting temperature. However the welding rod I tried to use was a junk. It melted all around the muffler but didn't stick at all.

At the same hardware store I bought some aluminium welding rods. I have no clue how they work but I tried them anyway. This stuff melted easy and even started to stick to the muffler parts. I'm not sure how good my welding is (I've seen better) and if this thing will hold. At least it holds now. If it doesn't work, I wil give up and let do it to someone who has right tools and knows what he is doing.

I hate this. I would rather build and fly planes than burn my fingers[:@]