CamoDeafie
New Member
- Joined
- Jan 7, 2010
whats the real differences between say 8445 Iron heads and the other Iron heads offered in TRs? I've searched high and low and never quite found concrete explanations as to why the 8445 heads are better than the other TR heads except for aftermarket heads....can someone explain this to me? does it have to do with flow numbers, or is it just because they're used in the SFI engines?