LT1-LT4 Modifications 1993-97 Gen II Small Block V8

MLS Cometic Gasket. What size bore gasket for a 4.030 bore engine?

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Old 06-09-2010, 07:31 PM
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Default MLS Cometic Gasket. What size bore gasket for a 4.030 bore engine?

Alright I got 403rwhp through an m6 and 9" and will be shooting a 250 shot on top of that. Not sure if you needed to know any of that. But I want to get a cometic gasket but on there website I see lt1 gaskets with a bore size of 4.040 and the other one is 4.110.

Now I have heard it is probably a good idea to get a gasket with a bigger bore size than the engine has, but I have no idea how much bigger. So what size gasket bore should I get for my 4.030 bore engine? Remember I plan on spraying a fairly big shot if that matters. Thanks for any help.
Old 06-09-2010, 08:10 PM
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4.040 will be fine.
Old 06-09-2010, 08:55 PM
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x2 ^ with him
Old 06-10-2010, 10:20 AM
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.040" is cutting it kinda close. They offer a 4.060" bore gasket.
Old 06-11-2010, 09:06 AM
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you want to make sure that the gasket is not protruding into the chamber.



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