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main bearing set 20b 30c std t steel backed Silverline

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main bearing set for use with a 20 block (cut .50mm/.020"), 30 crank (ground .75mm/.030"), standard thrust (not cut) on the block.
For bug style air cooled blocks.
Silverline brand bearings (over 40 years as an original equipment & aftermarket supplier).
Also known as part# 111 198 477MX.
Picture is not of these main bearings, but they are steel backed Silverlines
Ships within 1-3 business days
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