Exterior View	Models/Attributes
	Models P-40, A ,B & C -Virtually identical from exterior -Model P-40 did not have wing guns -A has 1 .30 cal. gun per wing -Small chin intake -2 .50 cal. guns on top of nose -Small "tapered" rear canopy windows
	Models D & E -D has 2 .50 cal. guns per wing -E has 3 .50 cal. guns per wing -Larger chin intake
	Model F -No upper nose intake
	Model K -New tail design w/extended dorsal fin -Upper nose intake
	Model L -No upper nose intake -Extended fuselage
	Model M -Perforated cooling grill forward of stacks -Extended fuselage
	Model N -Rear canopy redesign -Cooling grill -Extended fuselage

Production models ranged from the P-40 through the P-40N
P-40G - 1 P-40, 39-221, after factory rework
P-40H - Model designation not assigned
P-40I - Model designation not assigned
P-40J - Model designation not assigned