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What size bearings should I go with?

It's best practice before buying any set of bearings to first measure your bearing journals with a set of quality micrometers.  This is usually handled by your machinist/engine assembler.  For your convenience we've provided some factory specifications:


RB26 Main Bearing Journals Inside Diameter

⦶ 58.645 ~ 58.670

RB26 Main Bearing Journals Crankshaft Diameter

⦶ 54.951 ~ 54.975

RB26 Connecting Rod Big End Inside Diameter

⦶ 51.000 ~ 51.013

RB26 Connecting Rod Big End Crankshaft Diameter

⦶ 47.961 ~ 47.974

ACL 6B2960H-.25 Race Series Rod Bearing Set (+0.25”) - Nissan RB25 RB26

$ 67.10$ 50.3350.325USD
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ACL 6B2960H-.025 Race Series Rod Bearing Set (+0.025”) - Nissan RB25 RB26

$ 67.10$ 50.3350.325USD
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Cosworth 20002729 Performance Main Bearing Set - RB25 RB26

$ 188.00188.0USD
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