100 Series Toyota Land Cruiser & Lexus LX470 Torsion Bar Comparison Table

Cruiser Patch 29mm torsion bars (1160mm long, petrol)

Cruiser Patch 27mm AHC torsion bars (1160mm long, petrol)

curated by Patch Agan

Part No. (LH, RH)	Frame	Variant Details	Length	Diameter	% stiffness of OEM AHC bars*	Material	Notes
LH: ~~48162-60020~~ RH: ~~48161-60020~~	HDJ100	w/ AHC	1210mm	25.5mm	100%	-	Delisted
LH: 48162-60010 RH: 48161-60010	HDJ100		1210mm	31.5mm	263%	-
LH: 48162-60040 RH: 48161-60040	UZJ100	w/ AHC	1160mm	25.4mm	100%	-	OE U.S. spec w/ AHC
LH: 48162-60030 RH: 48161-60030	UZJ100		1160mm	28.87mm - 29mm**	~167% - ~170%	-	OE U.S. spec
LH: 48162-60080 RH: 48161-60080	FZJ100		-	-	-	-
LH: 48162-60100 RH: 48161-60100	FZJ100	w/ OE winch	-	-	-	-
Ironman4x4: TOY050-100LC	UZJ100		1160mm	32.45mm	~266%	"thick spring steel"	TOY050-LX470 (same part)
X-Sway (formerly Sway-A-Way): 1661	UZJ100		1160mm	32mm	~252%	"Solid aircraft-grade steel, heat treated"
X-Sway (formerly Sway-A-Way): 1660	HDJ100		1210mm	32mm	~248%	"Solid 4340 alloy steel, heat treated"
Old Man Emu (ARB): 303001	UZJ100		1160mm	30.4mm	~205%	"premium grade spring steel"
Old Man Emu (ARB) 303002	HDJ100		1210mm	32.8mm	~274%	"premium grade spring steel"
TJM: 657025	UZJ100		1160mm	32mm	~252%	"premium grade spring steel"
TJM: 657024	HDJ100		1210mm	32mm	~248%	"premium grade spring steel"
Dobinsons: TB59-1600	UZJ100		1160mm	-		"heavy duty"
Dobinsons: TB59-1610	HDJ100		1210mm	-		"heavy duty"
Cruiser Patch: 1661-CP27K	UZJ100	w/ AHC	1160mm	27mm	~128%	"Solid aircraft-grade steel"
Cruiser Patch: 1661-CP29.5K	UZJ100		1160mm	29.5mm	~182%	"Solid aircraft-grade steel"

For those curious how the difference in spring rate is determined, here's our calculations/equation*:

[(TB^4)/(25.4^4)]*100 = % stiffness of OEM AHC 1160mm 25.4mm bar

[(TB^4)/(25.4^4)]*100 = % stiffness of OEM AHC 1210mm 25.5mm bar

*metallurgy also determines spring rate. Given the unknowns about each manufacturer's material, these rates are merely estimates.
**some OE non-AHC 1160mm bars have been measured at differing diameters according to mud threads in the past.