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Forum: General Boating Discussion

10-11-2012, 10:10 PM

Replies: 4

Gaining more horsepower from a 496 mercruiser 8.1

Views: 5,952

Posted By dereknkathy

it is nearly a 1/4 inch of bore. takes a...

it is nearly a 1/4 inch of bore. takes a completely different block (wall thickness) to get that bore. the biggest difference is the breathing room under the valves the bigger bore allows. you can...

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