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Discussion Starter #1
This is a question I’ve wondered about for quite some time.
I’ve built a few big valve heads, and always replaced the seats.
However, the 655 head I just dropped at the machinist appears to have seats that can be machined for the big valves. (44mm int./38mm exh).

Anyone ever build a big valve head without replacing the seats?
How did it turn out?
How did it perform?

I’m really just wondering if it’s worth my time to seek out the replacement seats.

Thanks, in advance.

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