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Speedway Chevy 400 Oversized Rear Main Seal

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Speedway Chevy 400 Oversized Rear Main Seal

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Quality replacement rear main seal for S/B Chevy 400 V-8.

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Product Q&A

1 questions : 1 answers

1 answers

What is oversize about this seal? Will this fit Chevy 2.45" seal surface? My seal surface is about 0.020" smaller than it should be. Is this what the oversize seal is meant to be used for"

Louie928
May 15, 2013

What is oversize about this seal? Will this fit Chevy 2.45" seal surface? My seal surface is about 0.020" smaller than it should be. Is this what the oversize seal is meant to be used for"

Answers

May 16, 2013
Jason
The stock 400 block uses the standard 350 rear main seal. If you line bore the block it cuts out the 350 lip and in that case you need to use seal number 91010233 or the Felpro equivalent.
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