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project zs 260
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20-04-10, 10:42 AM
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roverdave81
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Join Date: Oct 2008
Location: coventry
Posts: 544
zs 260
standard piston will take 15psi as long as you get the fuel right with out problems as long as its the 220/420 engine the 620/820 used dif pistons and are only go for 12psi max my old 220 gsi ran 14psi and never let me down
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