The cylinder block is a high - pressure die cast aluminum design, with an open deck and cut slots between each cylinder; cast steel cylinder liners increase longevity. (pentastars.com)
New cylinder liners that were now pressed into the aluminium block instead of the original cast - in variants allow a thinner liner, which in turn allows a larger capacity of 4.7 L. (en.wikipedia.org)
Other new technology includes nano - surfaced cylinder liners, which reduce fuel consumption, and help to protect the engine from heat build up at high speed. (evo.co.uk)