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Busy cleaning threads, cleaning gasket sufaces etc ready to bolt down head. One thought has been troubling me. When i tore the head down i cleaned and sorted all components and handed it all over to the headbuilder. I noticed this head did not have any spring seats during teardown, same as two previous heads. I'm wondering were spring seats (as opposed to shims that alter spring values) used on all bp heads, hla/solid heads only etc. I just cant remember handing any over even though everything that came out of the head was catalogued and sent together.
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