Peterbilt 357/378 Parts
Find the best Peterbilt 378 aftermarket parts in the business here at 4 State. The Peterbilt 378 semi truck represents all of the characteristics of the Peterbilt brand, and was a popular model with similar features to the Peterbilt 379. Pete truck models are a brand of choice for experienced truckers who need dependable semi trucks. 4 State Trucks has all the semi truck parts and accessories you need to make your Pete 378 stand out to showcase your unique personality. Whether you need aftermarket bumpers, exhaust, or fuel tanks, we've got you covered. Hit the open road in style and comfort with the best custom gear for your Peterbilt heavy duty truck or 18 wheeler.
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Black Powder-Coated Retractable Step
AFTERMARKET
$246.99Black Powder-Coated Retractable Step * High Quality Truck Step * Black Powder Coated Retractable* Each Step Has Non-Slip Treads And Is Ideal For Truck And Trailers* The Slide-In Horizontal Storage Avoids Interference With Toolboxes Reservoirs And More*...$246.99 -
17.38 X 30.25 Inch Compact Two-Rung Retractable Truck Step W/ Non-Slip Tread
AFTERMARKET
$360.9917.38 X 30.25 Inch Compact Two-Rung Retractable Truck Step W/ Non-Slip Tread * High Quality Truck Step* Made Of 304 Stainless Steel * Retractable Two Rung * 17.38 X 30.25 Inches * Compact Two Rung Design Has Non Slip Threats * The Compact And Retractable...$360.99 -
Gooseneck Safety Chain U-Bolt Kit W/ Springs, Nuts, Washers
CURT MANUFACTURING
$34.99Spring-Loaded Gooseneck Safety Chain U-Bolt KitKeep your gooseneck trailer safety chains secure with this CURT U-Bolt Kit! With a spring-loaded design and durable zinc-plated finish, it keeps safety chain loops snug. This kit is compatible with the CURT...$34.99 -
Brake Master Cylinder Brake Booster W/ 1.25 Inch Master Cylinder - Replaces 8-97315-166-0, 97315166
DAYTON / DORMAN
$141.99Brake Master Cylinder Brake Booster W/ 1.25 Inch Master Cylinder * High Quality Brake Master Cylinder * Brake Booster Included: Yes* Master Cylinder Bore Diameter: 1-1/4 Inch* Master Cylinder Cap Included: No* Master Cylinder Material: Cast Iron*...$141.99 -
Lower Passenger Side Adjustable Suspension Control Arm - Replaces 68012164AA, 9063304107, 9063304707
DAYTON / DORMAN
$203.99Passenger Side Lower Adjustable Suspension Control Arm * High Quality Suspension Control Arm* Connector Gender: Female* Height: 1 Inch* Length: 3.25 Inch* Package Contents: 1 Diesel Glow Plug Controller* Package Quantity: 1* Packaging Type: Box* Terminal...$203.99 -
Lower Driver Side Adjustable Suspension Control Arm - Replaces 68012165AA, 9063304007, 9063304607
DAYTON / DORMAN
$203.99Driver Side Lower Adjustable Suspension Control Arm * High Quality Suspension Control Arm* Adjustable: Yes* Attachment Type: Pressed* Ball Joint Included: Yes* Ball Joint Installed: Yes* Ball Joint Stud Type: Threaded* Ball Joint Thread Diameter: 14 Mm*...$203.99 -
Bulldog HD Front Shock Absorber For PACCAR W990, 330, 357, 362, 378, 379, 384, 385, 386
BULLDOG HD SHOCKS
$66.85HD Shock Absorber Replaces 2021459, 306444C91, 308646C91, 308668C92, 308669C91, 320444C91, 329316C92Find premium shock replacements for your truck at 4 State Trucks. We carry these front Bulldog Heavy Duty Shocks, reengineered to last longer and perform...$66.85 -
Easy Entry Folding Step For Semi Trailers, Box Trucks, Flat Decks
LUVERNE
$310.99Easy Entry Folding Step * High Quality Entry Folding Step* Greatly Enhances Safety For Climbing In And Out Of The Trailer Or Cargo Area * Ergonomic Design Reduces Strain And Promotes Worker Health And Wellness * Easier Rear Access Increases Speed And...$310.99 -
CSM SS Tommy Gun Step Plate - Plain, 5 X 20 X 1/4 Inch
CHROME SHOP MAFIA
$199.995 X 20 X 1/4 Inch Billet Aluminum Step Plate With Stainless Steel Tommy Gun Design Insert By Chrome Shop Mafia * High Quality Step Plate * Billet Aluminum Step Plate* Billet Base With Mill Finish * Stainless Steel Custom Engraved Insert With Tommy Gun...$199.99 -
CSM SS American Flag Step Plate - Plain, 5 X 20 X 1/4 Inch
CHROME SHOP MAFIA
$203.995 X 20 X 1/4 Inch Billet Aluminum Step Plate With Stainless Steel American Flag Design Insert By Chrome Shop Mafia * High Quality Step Plate * Billet Aluminum Step Plate* Billet Base With Mill Finish * Stainless Steel Custom Engraved Insert With American...$203.99 -
Bulldog HD Front Shock Absorber With Double Lip Seal Design, 12.68 Inch Comp. Length, 7.01 Stroke For Peterbilt
BULLDOG HD SHOCKS
$67.14Commercial Grade Heavy Duty Shock Absorber W/ Double Lip SealFind premium shock replacements for your truck at 4 State Trucks. We carry these front Bulldog Heavy Duty Shocks, reengineered to last longer and perform better than the part that came with...$67.14 -
Bulldog HD Rear Shock Absorber Replaces 14QK3101M, 14QK2136M, 20897198
BULLDOG HD SHOCKS
$74.60Commercial Grade Heavy Duty Shock Absorber - Replaces 21462382, 22202559, 222202560 & 471700009647Bulldog HD shocks are fleet tested and approved. This is a premium rear replacement shock reengineered to be better than the factory part that came with...$74.60