Car & Truck Chassis & Suspension Parts

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Welcome to the home of great handling and ride quality! We stock a huge assortment of car and truck chassis and suspension parts like shocks, struts, and coil and leaf...

Welcome to the home of great handling and ride quality! We stock a huge assortment of car and truck chassis and suspension parts like shocks, struts, and coil and leaf springs, so whether you want a smooth street ride, responsive race handling, or rugged off-road control, you can find all the parts you need for your suspension upgrades here. We have complete lowering kits for a road-hugging sport stance, and lift kits to accommodate massive tires and greater suspension travel. Summit also has steering components, sway bars, frame rails and connectors, tie rods, wheelie bars, and wheel tubs, plus engine, transmission, and...

Showing All Items, Including Not in Stock Items That Match "D400"

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Results 1 - 25 of 143

QA1 Mopar Front Street Performance Coilover Conversion Systems 52346-D400

Suspension Package, Front, Street Performance, 0 in. to 2 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Arms, Mopar, Kit

Part Number: QA1-52346-D400

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

QA1 Mopar Front Street Performance Coilover Conversion Systems 52346-S400

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Skyjacker Softride Lift Leaf Springs for 1989-1993 W250, W350 - D400C

Lift Springs, Front, Leaf Type, Black, Dodge, 4WD, Pair

Part Number: SJA-D400C

3.0 out of 5 stars ( 1 )

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

QA1 Mopar Front Street Performance Coilover Conversion Systems 52343-D400

Suspension Package, Front, Street Performance, 0 in. to 2 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Arms, Mopar, Kit

Part Number: QA1-52343-D400

Not Yet Reviewed

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

QA1 Mopar Front Street Performance Coilover Conversion Systems 52347-D400

Suspension Package, Street Performance, Front, 2 in. to 4 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Arms, Mopar, Kit

Part Number: QA1-52347-D400

Not Yet Reviewed

Estimated Ship Date: Apr 27, 2026 if ordered today

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Estimated Ship Date: Apr 27, 2026 if ordered today

QA1 1965-79 F-100 Coilover Conversion Systems for 1965-1979 F-100, 1975-1979 F-150 - 52621-D400

Suspension Handling Package, Front, 5 in. to 7 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Control Arms, Kit

Part Number: QA1-52621-D400

Not Yet Reviewed

Estimated Ship Date: Apr 29, 2026 if ordered today

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Estimated Ship Date: Apr 29, 2026 if ordered today

QA1 1965-79 F-100 Coilover Conversion Systems for 1965-1979 F-100, 1975-1979 F-150 - 52620-D400

Suspension Handling Package, Front, 3 in. to 5 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Control Arms, Kit

Part Number: QA1-52620-D400

Not Yet Reviewed

Estimated Ship Date: Apr 29, 2026 if ordered today

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Estimated Ship Date: Apr 29, 2026 if ordered today

Skyjacker Suspension Lift Kits for 1975-1993 RAMCHARGER, 1975-1981 TRAILDUSTER - D400BKS-H

Suspension Lift Kit, 4.00 in. Lift, Front and Rear Leaf Springs, U-Bolts, Hydro Shocks, Dodge, Plymouth, Kit

Part Number: SJA-D400BKS-H

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Landrum Front Coil Springs D400

Coil Spring, Front, 5.5 in. Diameter, 8.0 in. Height, 400 lbs./in., Gold, Each

Part Number: LAN-D400

Not Yet Reviewed

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

QA1 Mopar Front Street Performance Coilover Conversion Systems for 1963-1966 VALIANT, DART, 1964-1966 BARRACUDA - 52341-D400

Suspension Package, Front, Street Performance, 2 in. to 4 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Arms, Mopar, Kit

Part Number: QA1-52341-D400

Not Yet Reviewed

Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

QA1 Mopar Front Street Performance Coilover Conversion Systems for 1963-1966 VALIANT, DART, 1964-1966 BARRACUDA - 52340-D400

Suspension Package, Front, Street Performance, 0 in. to 2 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Arms, Mopar, Kit

Part Number: QA1-52340-D400

Not Yet Reviewed

Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

Skyjacker Suspension Lift Kits D400BKS

Suspension Lift, 4WD, 4.0 in. Front/4.0 in. Rear, Dodge, W100/W150/W200/W250/W300/W350 Pickup, Kit

Part Number: SJA-D400BKS

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

QA1 Mopar Front Street Performance Coilover Conversion Systems 52344-D400

Suspension Package, Front, Street Performance, 2 in. to 4 in. Drop, Double Adjustable Coilover, 400 lbs./in. Spring Rate, Tubular Arms, Mopar, Kit

Part Number: QA1-52344-D400

Not Yet Reviewed

Estimated Ship Date: Apr 21, 2026 if ordered today

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Estimated Ship Date: Apr 21, 2026 if ordered today

Skyjacker Suspension Lift Kits for 1975-1980 W300, 1974 W300 PICKUP, 1981-1993 W350 - D400CAK

Suspension Lift, 4WD, Add a Leaf/Spacer, 3.0 in. to 4.0 in. Front, Dodge, Kit

Part Number: SJA-D400CAK

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Skyjacker Suspensions - Suspension Leveling & Lift Kits for 1975-1980 W300, 1981-1993 W350 - D400CKS-X

Lift Kit-Suspension w/Shock, 3/1" SYS 74.5-93 DGE 1 TON

Part Number: SJA-D400CKS-X

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Skyjacker Suspensions - Suspension Leveling & Lift Kits for 1975-1980 W300, 1981-1993 W350 - D400CAK-X

Lift Kit-Suspension w/Shock, 3/4" 74.5-93 DGE 1T W/ADDLF

Part Number: SJA-D400CAK-X

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Skyjacker Suspensions - Suspension Leveling & Lift Kits for 1987-1993 W250, W350 - D400CDAK-X

Lift Kit-Suspension w/Shock, 4" CUMMINS DSL W/REAR ADDAL

Part Number: SJA-D400CDAK-X

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Skyjacker Suspension Lift Kits D400BK

Suspension Lift, 4WD, 4.0 in. Front/4.0 in. Rear, Dodge, Plymouth, Kit

Part Number: SJA-D400BK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Estimated Ship Date: Tomorrow

Skyjacker Suspension Lift Kits for 1989-1991 W250, W350 - D400CDK

Suspension Lift, 4WD, 4.0 in. Front/2.0 in. Rear, Dodge, W250/W350 Pickup, Kit

Part Number: SJA-D400CDK

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Skyjacker Suspension Lift Kits D400AK

Suspension Lift, 4WD, 4.0 in. Front/2.0 in. Rear, Dodge, W100/W200/W300 Pickup, Kit

Part Number: SJA-D400AK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Skyjacker Suspension Lift Kits for 1975-1980 W300, 1974 W300 PICKUP, 1981-1993 W350 - D400CK

Suspension Lift, Leaf Springs/Add A Leafs, Front, Dodge, Kit

Part Number: SJA-D400CK

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Skyjacker Suspension Lift Kits D400BAK

Suspension Lift, 4WD, 4.0 in. Front/Leveled Rear, Dodge, W100/W150/W200/W250 Pickup, Kit

Part Number: SJA-D400BAK

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Skyjacker Suspensions - Suspension Leveling & Lift Kits for 1975-1993 RAMCHARGER, 1975-1981 TRAILDUSTER - D400BRK-X

Lift Kit-Suspension w/Shock, 4" SR 74.5-93 DGE RAMCH/TRL

Part Number: SJA-D400BRK-X

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Skyjacker 4WD Suspension Lift Kits for 1987-1993 W250, W350 - D400CDAK-M

Lift Kit-Suspension w/Shock

Part Number: SJA-D400CDAK-M

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

Skyjacker Suspensions Suspension Lift Kit Components D400AK-N

Lift Kit-Suspension w/Shock

Part Number: SJA-D400AK-N

Not Yet Reviewed

Estimated Ship Date: Tomorrow if ordered today

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Estimated Ship Date: Tomorrow if ordered today

Skyjacker Suspensions - Suspension Leveling & Lift Kits for 1975-1980 W300, 1981-1993 W350 - D400CK-X

Lift Kit-Suspension w/Shock, 3-4" 74.5-93 DODGE 1 TON

Part Number: SJA-D400CK-X

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

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