After just 33 hours of operation my 973-383 exhaust system, the header pipe to #4 cylinder broke. It appears the crack started at the weld of the EGT nipple. My previous Kitfox manufactured exhaust system lasted 1100 hours. After the cracked header, I checked and carb sync was fine and dynamic balance with my DynaVibe was under 0.13 ips. Did I just get unlucky with a manufacturing defect or might I have done something wrong?
11332_1_header 4.jpg (You do not have access to download this file.)
11332_1_crack-header4.jpg (You do not have access to download this file.)
