head casting numbers 25506293

[Buick_noob]

Should I stick with 8445 or these for a 109 build?

 

[Buick_noob]

Should I stick with 8445 or these for a 109 build?

I guess what I meant was what is the difference?

 

[Kovmat]

There is good info on this topic in this post:

http://www.turbobuick.com/forums/general-turbo-buick-tech/174142-6293-8445-wtf.html?highlight=8445+6293

 

[87buickracer]

6293 heads

I run the 6293 heads.The difference is the water jackets.the 6293 were the early design.you can run them stock or have them ported and polished.

 

[bison]

6293 heads in my sig. No problems and no downsides vs. 8445 castings. I have seals on exhaust and intake valve stems.