Features of Note:
- This is the Federal Mogul/Sealed Power #H521AP piston with the turbo .245 dish.
- It has a much shorter skirt than the factory piston.
- It does not have a full skirt.
- It has much less support under the piston pin.
- It does not have the oil drippers from the lower ring to lubricate the piston pin.
- It does not have the steel support for the top ring.
- It does have a much higher shine to the machined surfaces.
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Features of Note:
- It has two notches in the top of the piston to show the side installed toward the front of the motor.
- It has a fully machined top and sides. The GM piston has a cast top.
- It has oil drain holes from the bottom ring which flow down inside the piston.
- It would seem that the greatly reduced amount of piston skirt, and thelack of a full skirt design, would allow the piston to rock more in the piston bore than a GM piston.
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