"The 1JZ head was designed by Yamaha iirc. And yeah, it flows better. Of course, with a bit of work the 2JZ head flows every bit as good. The only reason a 1.5JZ should ever exist is if you screw up the 1JZ block."
Mis-informationa alert.. 2JZ intake-236cfm 1JZ intake-215cfm at .4 lift.. The...