A couple of months ago, my muffler cracked again where the tailpipe comes out of the muffler. I talked to Kitfox, and they gave me the number to Experimental Aircraft Exhaust in Lake City, Mn. I ordered one, and never heard another word till two days ago. I had kind of forgot about it, as I had got mine welded back up with some braces to the tail pipe and it's been fine since. Anyway, they said it was ready to ship. It showed up yesterday, and here it is. Base cost was $750, at my door with sales tax and shipping was $839. Anyway, it looks good, it's made to fit the standard Kitfox motor mount style for the model 3 and 4 that uses the four arms to bolt to the engine. I do wish I had made them put a brace between the tailpipe and the muffler though. JImChuk