Exhaust tips seem to be welded

[GromitInWA]

I was under my car attempting to do the spark plugs (got 3 out of the 6 between the two sides but that's another story.) I thought I'd try to remove the exhaust tips to give them a good polish but although the bolt came out easily, the tip would not budge because of the spot welds that are present.

From other posts this seems to be unusual since I thought they just slid off.

What's the easiest way to get them off? Do you think that I'll get rattling if they are reattached just with the bolt and no new welds?

[Ahsai]

It can be easily removed from the exhaust at the short elbow joint. So tip keeps attached to the short elbow piece like this http://www.vividracing.com/catalog/supersprint-exhaust-tips-porsche-996-c2c4-9904-p-7527.html

[RFM]

This was probably done by the previous owner, this type of exhoust tips is sensitive to vibrations after a couple of years, associated with a very irritated sound. Usualy even one or more brackets, on the rear of the tip, break off, watch out for that.

[GromitInWA]

Many thanks.