Boxster S Exhaust Rattle...

[RandallNeighbour]

When Boxtaboy says "heat shield" note that there are two kinds. The thin aluminum ones that are bendy and the steel ones that make those rattles.

If you find one is loose, take a hammer and whack it a couple of times to bend it and tighten it up.

This is one time when using a hammer on a Porsche is authorized

[BoxsterLewis]

I have 2 Boxster S cats that are in good condition if you want to buy them

[boxa986]

Don’t bother with the hammer. I used 2 large jubilee clips these were easy to fit take about 15 minutes. I had mine fitted 8 months ago and there still isn’t a rattle.

Good luck

[dallison]

sounds like heat shields. 2 of mine are loose, one on the passenger cat and the other is on the pipe leading to the cat. I haven't put much thought into the one ont he pipe, but i'll prob hit it with a hammer.

[Daniel R]

Most likely heat shields on the cats.

Unless you are emissions tested, do what a few of us have done and install bypass pipes to delete the cats. The sound is better, weight is reduced, and power is (slightly) increased.

[melsh]

Had a rattle from rear cat found it to be the lamber sensor probe loose tightened it up and the rattle has gone. You will find the sensor above the cat