5.8L 4V GT500 Aluminum Shortblock 1200 HP (2013-2014 GT500) JDM Engineering 5.8L 4V GT500 Aluminum Shortblock 1200 HP (2013-2014 GT500) Looking to bullet proof your 2013-2014 Shelby GT500 5.8L 4V Trinity engine? Team JDM has you covered with this 1200 HP capable, fully built aluminum shortblock!... MSRP: Was: Now: $12,999.00