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...

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Results 1 - 25 of 1426

Hellwig EZ-550 Helper Spring Kits 550

Hellwig EZ-550 Helper Spring Kits 550

Helper Spring, EZ-550, Black Powdercoated, Kit

Part Number: HEL-550

4.73 out of 5 stars ( 11 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Summit Racing™ 7 Inch Coilover Spring SUM-72-07-550

Coil Over Spring, 550 lbs./in. Rate, 7 in. Length, 2.5 in. Inside Diameter, Silver Powdercoated, Each

Part Number: SUM-72-07-550

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Lares Steering Column Intermediate Shafts 550

Steering Column Intermediate Shaft

Part Number: LSC-550

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

QA1 1988-98 C1500 Level 2 Front Coilover Conversion Systems 52612-S550

Coilover Conversion, Single Adjustable Shocks, 550 lb. Spring Rate, Upper/Lower Control Arms, Tubular, Black, 0-2 in. Drop, Chevy, GMC, Kit

Part Number: QA1-52612-S550

4.71 out of 5 stars ( 7 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Classic Performance Dual Adjustable Front Coilover Conversion Kits for 1970-1981 CAMARO, FIREBIRD - 7081COK-2A550

Coilover Conversion Kits, Front, 550 lb. Springs, 0-3 in. Height Adjustable, Twin-Tube Adjustable Shocks, Chevrolet, Pontiac, Kit

Part Number: CLP-7081COK2A550

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Classic Performance Dual Adjustable Front Coilover Conversion Kits 6387COK-2A550

Coilover Kit,Dual Adjustable Front Coilover, 0-3 in. Lowered, Aluminum Body, Clear Anodized, Silver Powdercoated Springs, Chevy, GMC, Kit

Part Number: CLP-6387COK2A550

4.25 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Classic Performance Dual Adjustable Front Coilover Conversion Kits 7887COK-2A550

Coilover Conversion Kits, Front, 550 lb. Springs, 0-3 in. Height Adjustable, Twin-Tube Adjustable Shocks, Chevrolet, Pontiac, Buick, Oldsmobile, Kit

Part Number: CLP-7887COK2A550

Not Yet Reviewed

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

QA1 Pro 10 Inch Coilover Spring 10HTSP550

Coilover Spring, Pro, Pigtail Style, 550 lbs./in. Rate, 10 in. Length, 3.50/2.50 in. I.D., Silver Powdercoated, Each

Part Number: QA1-10HTSP550

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Addco Performance Anti-Sway Bar Kits K1-550-0U

Sway Bars, Anti-Sway Bar Kits, Front, Solid, Steel, Black Powdercoated, 1.125 in. Diameter, Ford, Mercury, Kit

Part Number: ACO-K1-550-0U

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

QA1 Pro 10 Inch Coilover Spring 10HTBF550

Coilover Spring, Pro, Flat Style, 550 lbs./in. Rate, 10 in. Length, 4.10/2.50 in. I.D., Silver Powdercoated, Each

Part Number: QA1-10HTBF550

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

QA1 Coilover Kits DD42-550

KIT, PROMA STAR D-ADJ, 9" SILVER SPRING, 10.13" SHOCK, 2.5" ID X 550LB SPRING

Part Number: QA1-DD42-550

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

OER Rear Leaf Spring Shackle Sets K550

Shackle Set, Chevy, Pontiac, Each

Part Number: OER-K550

4.29 out of 5 stars ( 7 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

QA1 High-Travel 10 Inch Coilover Spring 10HT550

Coilover Spring, High Travel, 550 lbs./in. Rate, 10 in. Length, 2.50 in. I.D., Silver Powdercoated, Each

Part Number: QA1-10HT550

4.83 out of 5 stars ( 6 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Classic Performance Dual Adjustable Front Coilover Conversion Kits 5564COK-2A550

Coilover Conversion Kits, Front, 550 lb. Springs, 0-3 in. Height Adjustable, Twin-Tube Adjustable Shocks, Chevrolet, Full Size, Kit

Part Number: CLP-5564COK2A550

Not Yet Reviewed

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Summit Racing™ 10 Inch Coilover Spring SUM-72-10-550

Coil Over Spring, 550 lbs./in. Rate, 10 in. Length, 2.5 in. Inside Diameter, Silver Powdercoated, Each

Part Number: SUM-72-10-550

Not Yet Reviewed

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Sachs Stock Replacement Shocks and Struts for 2001-2006 M3 - 317 550

Stock Replacement, Twin Tube, Gas Charged, Each

Part Number: SXR-317-550

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Timbren Suspension Enhancement Systems for 2005-2026 F-350 SUPER DUTY, 2005-2025 F-550 SUPER DUTY - FF550SDH

Suspension Helper Springs, with Hardware, Front, Ford, Kit

Part Number: TBI-FF550SDH

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

Dorman Tie Rod Ends 544-550

Tie Rod, Ford Fusion 2012-06, Lincoln MKZ 2012-07, Lincoln Zephyr 2006, Mercury Milan 2009-06

Part Number: RNB-544-550

Not Yet Reviewed

Estimated Ship Date: May 1, 2026 if ordered today

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Estimated Ship Date: May 1, 2026 if ordered today

Landrum Barrel Springs W11-550

SPRING COILOVER

Part Number: LAN-W11-550

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Steeda S550 Ford Mustang Rear IRS Subframe Support Braces for 2015-2022 MUSTANG - 555-5754

Subframe Braces, Rear IRS, Mustang, S550 Coupe Models, Chromoly, Silver Powdercoat, Chassis Stiffeners, Pair

Part Number: SDA-555-5754

5.0 out of 5 stars ( 11 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Landrum Performance Spring Coil Springs HT8-550

2.5 ID x 8 DL COIL OVER

Part Number: LAN-HT8-550

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Dorman Replacement Rack and Pinion Bellows 541-550

Rack Bellow, Chevrolet 2011-05, Mazda 2017-04, Pontiac 2009-06, Toyota 2015-02

Part Number: RNB-541-550

Not Yet Reviewed

Estimated Ship Date: May 1, 2026 if ordered today

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Estimated Ship Date: May 1, 2026 if ordered today

QA1 Pro 10 Inch Coilover Spring 10HTSF550

Coilover Spring, Pro, Flat Style, 550 lbs./in. Rate, 10 in. Length, 3.50/2.50 in. I.D., Silver Powdercoated, Each

Part Number: QA1-10HTSF550

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/13/2026 if shipped by air

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Estimated Ship Date: Monday 4/13/2026 if shipped by air

Dorman Control Arm Bushings 533-550

Control Arm Bushing, Ford 1994-79, Lincoln 1994-80, Mercury 1994-79

Part Number: RNB-533-550

Not Yet Reviewed

Estimated Ship Date: May 1, 2026 if ordered today

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Estimated Ship Date: May 1, 2026 if ordered today

Heidts Coilover Shock Springs CQ-550-10-F

Coilover Springs, Gray/Silver, 10.0 in. Length, 550 lbs./in. Spring Rate, for Big Block Applications, Chevrolet, Pontiac, Pair

Part Number: HDT-CQ-550-10-F

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

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