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i purchased a speed factory no notch H beams vitari pistons and i was wondering if any knows if that the piston rings come pre gaped we put them in as is thinking that they are already gaped i have a d16y8 and its bored out .5 over
 

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pretty sure you're gonna need to gap the rings, or at a minimum verify that they are correctly gapped. I think good practice would be to check ring gap no matter what the seller said if it doesn't come pre-assembled.
 

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93 Civic HB SI
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Never assume rings are gapped. Usually they are not, and if they are they will most likely have a gap for NA duty, which would be too tight for turbo.

Always put them in the cylinder and check with a feeler gauge.

My last 75.5mm vitara experience did not have rings gapped for turbo, I had to cut them quite a bit wider.
 

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BATSLOMAN GIVES NO FUCKS.
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well put them back out ...

you need to make sure of the gap with a feeler on every build .

.I have never seen a pre gapped ring out of the box..especially not turbo d16 spec ,,
 
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