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Reload this Page Used Aftermarket Aluminum heads.

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Old 03-23-2025, 03:05 AM   #1
cjshaker
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Default Re: Used Aftermarket Aluminum heads.
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Originally Posted by Cool Kat with Hot Car View Post
Bored&stroked, For the uninitiated like me please define RA and MLS?

RA is the surface finish (average roughness), which is really important for MLS gaskets. MLS meaning multi-layer steel.


Cometic makes some of the best gaskets. Pricey, but worth it. Like mentioned though, surface finish MUST be adhered to.
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