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Oversized pistons

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TalonTSIawd1991

Probationary Member
29
0
Oct 30, 2007
New Hill, North Carolina
Hi, I am thinking about putting oversized pistons in a 420A. I was wondering is there any mods I should be doing to cope with putting bigger pistons in, also what kind of power gains should I get from some .020 over pistons, All help would be apprieciated.
 
No mods will be necessary and you will not gain significant hp. They usually bore a motor out due to worn out cylinders
 
Thanks for the answers, so back to hp gains, I have a few performace parts on the car like exhaust, intake, plugs and wires. Will this stuff go along with the bored out cylenders.
 
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