I sold my original exhaust off the RV-6 after it was wrecked at SNF, so no photos. For the rebuild I bought another exhaust from Larry, a four-pipe to fit around the M1B sump.
Early on (first 200 hours) I had chronic problems of breaking the flattened tubes particularly the two that join the pipes together at the outlet, and occasionally had the other two break a couple of times (the ones that attach to the engine mount.).
What I did was simple. I used a 3/4"x1/4" bar of aluminum, about 6" long, to join the two sets of pipes together, bolted to the exhaust clamps Larry provides. Then I fabricated the vertical pieces with bandsawed conveyor belt material 3/4" wide, 1/8" thick, with stainless sheet RTVed to the ends then holes drilled thru them for the AN3 bolts. Those were used as straps attached to heavy adel clamps to the mount, and to the Larry-supplied clamps on the exhausts. Never had a single problem after that.