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Can anyone help me with specs on a 2008 LTZ 490? Acquiring one tomorrow but cant seem to find anything on it
 

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Well, you take a 400, put a bigger piston in it, then put a bigger crank in it, then try to feed it with a bigger carb and more cam. Then let it all out through a bigger pipe. Anything else you need to know?
 

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Need big piston and stroker crank. I think +5 on the crank.
Have you searched the site? It's all here somewhere.
 

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Custom CFM Motorsports +6mm 13:1 JE 2-ring Piston, +5 Hotrods Crank

That's from CFM's signature. Ic Cube 490.
so I read 96mm piston with a +5mm crank
 

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I have a 490. +6 bore and +5 stroke makes a 490. It's not a common build, and it takes a lot of other modifications to make it worth building an engine like that.
 

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but when you do yee ha
 
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