Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-903	Rear	1,350	6

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-901	Rear	4,350lbs	8

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-731	Rear	800lbs	4

*For dual rear wheel only

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-721HD	Rear	4,500lbs	12

This is a heavy duty upgrade from stock and is only for the F-350 Dually

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1783HD	Rear	2,500lbs	4/1

This is an Extra Heavy Duty replacement for the stock three leaf or the four leaf version.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1747HD	Rear	5,500lbs	10

This is a Heavy Duty upgrade for the stock springs.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1747	Rear	5,500lbs	10

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1679-2	Rear	N/A	1

This is a Clip Leaf for the standard 43-1679 spring leaf.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1339HD	Rear	7,200lbs	10

This is a heavy duty upgrade for the OEM factory spring. 

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1339	Rear	5,100lbs	11

This is a direct replacement/upgrade for the OEM factory spring. 

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1337	Rear	10,350lbs	5/4

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1279	Rear	525lbs	1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1277	Rear	750lbs	1

OEM #  F81A5588DC / F81Z5588DA

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1261HD	Rear	3,900lbs	5/1

This is a Heavy Duty replacement for the stock leaf spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1185	Rear	1,434	3

This is a direct replacement/upgrade for the OEM factory spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1157	Rear	2,775lbs	3/1

This is a direct replacement/upgrade for the OEM factory spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1085SHD	Rear	5,000lbs	10

This is a direct replacement/upgrade for the OEM factory spring. 

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1085HD	Rear	4,000lbs	10

This is a direct replacement/upgrade for the OEM factory spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1085	Rear	3,460lbs	9

This is a direct replacement/upgrade for the OEM factory spring. 

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1041HD	Rear	3,750lbs	6/1

This is a Heavy Duty Upgrade.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1041	Rear	2,775lbs	4/1

This is a direct replacement/upgrade for the OEM factory spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
43-1033	Rear	1,685lbs	3/1

This is a direct replacement/upgrade for the OEM factory spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1633	Rear	2,800lbs	3/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1345HD	Rear	4,000lbs	8

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1339HD	Rear	2,600lbs	5

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1339	Rear	2,025lbs	4/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1337	Rear	1,705lbs	3/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1335	Rear	3,050lbs	3/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1329	Rear	2,105lbs	4/1

This is a direct replacement for the stock 4 leaf spring.

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
22-403	Rear	2,350lbs	6

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
22-1649HD	Rear	3,400lbs	4/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
22-1649	Rear	2,700lbs	4/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
22-1289HD	Rear	3,200lbs	5/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
22-1289	Rear	2,235lbs	5/1

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
22-1269	Rear	2,025 lbs	4/1

OEM # 15711753

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1465HD	Rear	3,300lbs	5/1PD

Part Number	Location on Vehicle	Spring Capacity	Number of Leaves
34-1465	Rear	2,800lbs	4/2PD

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 8 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest grade...

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 8 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest grade...

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 5 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest...

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 5 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest...

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 5 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest...

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 8 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest grade...

Custom U-bolts made to your specifications. Product Description: This is a BRAND NEW set of Grade 8 hardened U-bolts. These are the real thing, NOT the the low grade, under sized "universal" U-bolts that you usually get with most lift kits and aftermarket bolt-ons. We custom make all of our U-bolts using the highest grade...