Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
Mostly engine I do believe, M51,52,54's had turbo multi fuels similar but higher hp than the duece engine.
M800 series has the non turbo cummings engine.
Probably a few other minor details, but thats about it