what it is is a 1zz crank with extended rods and high comp pistons. our cars have week values any way trial has some that they say are indistructable but the run as much as the kit it self mwr has some too thats what im running but im aslo running a lower compression form my turbo (when it gets to me
) and if you read it will not beable to run on us pump gas becuase of the high compression scott at trail said that double gasketing may work but he would recomend lower comp pistons i hope that will help