Hello all. I'm looking for the size in either inches or mm for the exhaust clamps that attach the muffler to the U-pipes. I would like to replace mine with stainless steel. My stock clamps are pretty rusted and leaking air.

fits to mark the circumference, measure this say to 16/th of an inch with a rule, then divide by pi to get the diameter?

Or remove the old clamp and use a rule to measure its diameter?

Hello Marc..Just wanted to follow up. As always you give great advice. I went back and remeasured. The clamps that connect the U-pipes to the muffler are 44.5mm (1 3/4) and the coupler that connects the cats to the U-pipes are 45mm.

I was able to get stainless steel for the clamps but not the coupler. The coupler brand that I ordered actually makes the Porsche coupler. They fit perfectly. I saved about $50 ordering these clamps. Hope this helps someone else. Again thanks Marc.