its all fresh, and has been clearanced, standard stroke 5.7 ls1. 11:1 comp, the asuall stuff. Running a really agressive roller camshaft, longer rocker arms and rocker gear to suit. thats it. they are really very simple. My tuner is confident of mid 350kw @ the wheels and 550-600nm torque. running the tremec with Jim Berry ceramic clutch and 4.3:1 GTR diff.