Less Weight = More Power!! Introducing the absolute LIGHTEST pistons on the market - Our brand-new Hollow Crown Series! JE engineers have been working 24/7 for the past eighteen months to bring you the next feat in piston manufacturing and performance. They key is in the strategically placed voids precision-drilled through the crown of the piston that align with the combustion chamber, delivering maximum weight reduction and maximum combustion flow. Fax us now to get a set for your engine! Hurry, these will go fast!!