Many wastegates come with different sized seats so it can be used on multiple sized tubing. If someone built the system that was new to wastegate products or just plain forgot, they may have not known to add the right seat or, again, forgot to put it in. I could see where someone may have forgotten to put it in. You said it was a 35MM gate, but the pipe used may have been a 38mm or a 44mm and they used a 35mm intending to add the seat adaptor?? Just a guess. Mark L
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My Gasser '63 Catalina build. Oh sorry, it's a Street freak. Either way it's a fun build.
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