New 6.4L Casting on Heads?

-

GoldSwinger71

FABO Gold Member
FABO Gold Member
Joined
Nov 16, 2019
Messages
154
Reaction score
266
Location
Minneapolis, MN
I just had an interesting conversation with my engine guy -

Apparently the 6.4L crate had a change in the casting numbers (5037369BF) ? for the heads between the last batch they received. The earlier heads (BE and BD) with their recipe are putting out 610HP, the "new" ones are dynoing at 580HP.

Anyone have any insider information on the difference between any head changes in recent months? I wonder if it's emission based?

-Daniel
 
-
Back
Top