If you could post a photo, that would be helpful.
You don't say how long you have had the car, or how old it is, but it is worth trying the warranty approach, especially if there is any suggestion that it could have been leaking a the time of purchase. They will at least inspect the fault and provide a diagnosis. If it is a Porsche warranty, the exhaust is not on the list of wear and tear exclusions, so there is some hope there.
If you cannot get resolution there, some leaks can be welded but it is usually a fairly short term solution if the rust has taken hold in other places as well. The logical fix would be an OEM replacement and I would try for a discount 'gesture', especially if it is a sports exhaust with valves and under a Porsche warranty. Otherwise firms like Top Gear Exhausts and Carnewal have attracted a good following for their replacement systems. There are of course many others to choose from.
A word of warning if you are inclined to do the fitting yourself, the nuts, bolts and fittings degrade rapidly and, after three years or so, you may find your tool kit needs to contain an angle grinder and a blowtorch!
You don't say how long you have had the car, or how old it is, but it is worth trying the warranty approach, especially if there is any suggestion that it could have been leaking a the time of purchase. They will at least inspect the fault and provide a diagnosis. If it is a Porsche warranty, the exhaust is not on the list of wear and tear exclusions, so there is some hope there.
If you cannot get resolution there, some leaks can be welded but it is usually a fairly short term solution if the rust has taken hold in other places as well. The logical fix would be an OEM replacement and I would try for a discount 'gesture', especially if it is a sports exhaust with valves and under a Porsche warranty. Otherwise firms like Top Gear Exhausts and Carnewal have attracted a good following for their replacement systems. There are of course many others to choose from.
A word of warning if you are inclined to do the fitting yourself, the nuts, bolts and fittings degrade rapidly and, after three years or so, you may find your tool kit needs to contain an angle grinder and a blowtorch!