Originally Posted by Team hawk
Yo ppl I have a orignal O.s. 12. Tz and I know about all the Speed but I was wondering if you could just buy the head and mount it on the orignal tz???
in short, yes you cld buy the magnesium head and put it on your 12TZ.
from what i know, the magnesium heatsinks found on the OSspeed .12 and .21 engine are made by an aftermarket company office ZPI in japan..
frankly, you're better off using an aftermarket alu heatsink such as the Kawahara one, better cooling effect than the orig OS head.
in the end , this thread became a "alu vs mag" heatsink debate.
(yet no one answered your main question..
personally, i wouldn't use magnesium head on any of my cars, esp not my 1/8 buggy.
seen too many magnesium heads breaking off.
guess you know that magnesium becomes very brittle when it gets too hot.
the magnesium fins in the jdm evo9 turbo is a gd example..