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The gray band should be even more distinct on the valve seat in the head, thanks to the blue die. Like the seat on the valve, the gray band should fall right around the middle of the seat. With multi-angle valve jobs, as shown here, it is particularly important to verify where the valve is actually seating, as the width of the center 45-degree angle cut of the seat is usually fairly narrow as a result of the surrounding angle cuts. Our valves lapped in with minimal effort using fine compound. View Related Article
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