Definitly have it done by someone local. Those pads are just neoprene pads easily relicated. The caps are right on top and easily replaced. Very big improvement in my system although it sounds like you have some standing wave problem or whatever. When you see the size of the old caps you'll see why. I did mine for about 250.00 total parts and install and I didn't have to have it kicked all the way to Canada and back.
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