Need some fresh slugs for your LS? Diamond has two new pistons—flat tops and dished—for Chevy L92 / LS3 engines.
Configured for bore dimensions of 4.005 to 4.130and stroke lengths of 3.622 and 4.000, these new pistons have compression heights of either 1.304-in or 1.115-in and are supplied with alloy steel 8620 piston pins and spiral locks as well as a standard ring package, comprising 1.5mm (top); 1.5mm (second) and 3.0mm (oil control).
And because their top rings are positioned 0.260in down from the piston crown, these pistons will work well with small nitrous kits or super/turbochargers. That caught our interest considering we just spent a day having fun with a big 'ol ZEX fogger system on an LQ4.
The piston crowns both the flat tops and the dished versions are furnished with valve relief pockets of 0.175in (intake) and 0.105in (exhaust). Double pin oilers with interlinking grooves ensure adequate lubrication between the piston pins and their pin bores.
They're also available uncoated condition or with the Diamond Double Coat—fully anodized with a molybdenum skirt coating.
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