XC90 went for inspection today, mechanic says the front resonator has a very small leak somewhere, noticed only at WOT. It's been rotting for awhile now, currently held together with hose clamps. I'd rather not replace it as the design is flawed. The only issue is that it's not as simple as welding in a straight section of pipe due to the 2 cats needing to come together. Anybody know of a fix for this or seen one?