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Seasoned Prime Member
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When you buy the pistons they should have a spec sheet w/ them. Each type will be different. Cast pistons have a tighter clearance cause they don't expand as much as forged. Sometimes forged will knock a little on cold start cause they have a little looser clearance than cast. This is normal. Someone correct me if I'm wrong. Just my -2$en#e-

:nope:
 
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