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· Premium Member
overdeveloped beater
9,088 Posts
I think it so if you put piston in upside down you don't #&#$ your valves, they are different sizes, but then i could be on crack.
I doubt that.... If someone puts the pistons in backwards, they don't care if there is damage as a would be assembly error.

As I think about may be to allow for clearance when doing timing belt service....but I'm not totally sure on that either.
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