Mine cracked as well, after about 50 miles tops, in the same place as turbo Tims did. I am back to the Powderlites manifold, and more weight in my clutch then with Teds. I guess the log just isn't there like we all hoped it had been. I have been to busy riding to worry about sending mine back until Ted figures out what he is doing with all of them anways. I guess my opinion is if one guy got a refund perhapse we are all entitled since its been pretty much unanimous that they aren't working. The idea is great its nice to see a new product but no testing was defintaly a dissapointment, and you can feel ag ood 50+ hp diff on the manifolds back to back on my sled along with the increase in clutch weight, I beleive I ended up having to add close to 15g to hold my sled back with the PL manifold over the TAP one.