Mack Truck Parts
Find top-quality Mack truck parts at 4 State Trucks. Upgrade your rig with OE replacements and aftermarket solutions to ensure peak performance and durability. From bumpers and engine parts to fenders, you'll discover everything needed to keep your truck in prime condition. Hit the road confidently with reliable replacement Mack Truck parts.
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7-Way RV Blade Custom Wiring Harness Extension Isolator Hardware Kit For Aluminum Truck Beds
CURT MANUFACTURING
$13.19Custom Wiring Harness Extension Isolator Hardware Kit For Aluminum Truck Beds * High Quality Hitch* Securely Mounts A 7-Way RV Blade Extension Harness In An Aluminum Truck Bed * Neoprene Well Nuts Isolate Steel Bolts From Aluminum Surfaces * Includes...$13.19 -
Jost 5th Wheel Pin Bracket Kit
JOST
$377.99Jost 5th Wheel Pin Bracket Kit * High Quality 5th Wheel Pin Bracket Kits* Kit Includes:- 2 Fifth Wheel Bushing Jost- 2 Collar Nylon Jost- 1 Fifth Wheel Kit Without Bushings Jost* Sold As Set*** High Quality Aftermarket Replacement Part (Not OEM)**** This...$377.99 -
Vehicle-Side 4-Way Round Connector Socket W/ Spring-Loaded Dust Cover
CURT MANUFACTURING
$17.29Die-Cast Metal Vehicle-Side 4-Way Round Trailer Wiring Harness Socket W/ Spring-Loaded Dust Cover * High Quality Connector Socket* Splices Into Vehicle Wiring To Provide A Connection For A Trailer Plug * 4-Way Round Output Connects Tail Lights, Brake...$17.29 -
4-Way Flat License Plate Light Plug Connector Socket W/ 36 Inch Wires
CURT MANUFACTURING
$6.594 Way Flat License Plate Light Plug Connector Socket W/ 36 Inch 16-Gauge Color Coded Wire * High Quality License Plate Light Plug Connector Socket* Splices Into Vehicle Wiring To Provide A Connection For A Trailer Plug * 1-1/4 Inch Plug Fits A Typical...$6.59 -
Powered 3-To-2 Wire Taillight Converter W/ 4-Way Flat Output
CURT MANUFACTURING
$90.99Splice-In Powered 3-To-2 Wire Taillight Converter W/ 4-Way Flat Output, Snap Locks & Color-Coded Wires * High Quality Taillight Converter* Converts 3-Wire Vehicle Electrical System To Standard 2-Wire Trailer Wiring * 4-Way Flat Output Connects Tail...$90.99 -
Vehicle-Side 7-Way RV Blade Connector Socket W/ Integrated Bracket
CURT MANUFACTURING
$14.69Vehicle-Side 7-Way RV Blade Connector Socket W/ Integrated Bracket, Concealed Terminals & Spring Loaded Dust Cover * High Quality RV Blade Connector Socket * Splices Into Vehicle Wiring To Provide A Connection For A Trailer Plug * 7-Way Connects Tail,...$14.69 -
5-Way Flat Connector Mounting Bracket W/ Hardware
CURT MANUFACTURING
$6.595-Way Flat Connector Mounting Bracket * High Quality Connector Mounting Bracket* Securely Mounts A 5-Way Flat Connector Socket * Allows For Attachment To The Vehicle Or Trailer Hitch * Constructed From High-Strength Steel * Protected By A Durable Black...$6.59 -
Vehicle-Side 6-Way Round Connector Tester W/ LED Indicators
CURT MANUFACTURING
$13.19Black Plastic Vehicle-Side 6-Way Round Connector Tester W/ LED Indicators For Brake, Turn, Electric Brakes, Aux. Power * High Quality Connector Tester* Confirms Proper Function Of Vehicle-Side Wiring Connector * Tests 6-Way For Tail, Brake, Turn Signals,...$13.19 -
1.25 Inch 4-Way Flat License Plate Light Plug Adapter
CURT MANUFACTURING
$8.091.25 Inch 4-Way Flat License Plate Light Plug Adapter * High Quality License Plate Light Plug Adapter* Allows A 4-Way Flat Socket To Be Mounted In A License Plate Light Hole * 1-1/4 Inch Plug Fits A Typical License Plate Light Hole * Simple Plug-And-Play...$8.09 -
5-Way Flat Connector Socket W/ 60 Inch 16-G Color Coded Wires
CURT MANUFACTURING
$11.89Vehicle-Side 5-Way Flat Connector Socket W/ 60 Inch 16-G Color Coded Wires * High Quality Connector Socket* Splices Into Vehicle Wiring To Provide A Connection For A Trailer Plug * 5-Way Flat Connects Tail Lights, Brake Lights, Turn Signals And Reverse...$11.89 -
Powered 3-To-2 Wire Taillight Converter W/ Potted Enclosure, 4-Way Flat Output
CURT MANUFACTURING
$88.99Weather-Resistant, Powered 3-To-2-Wire Splice-In Trailer Taillight Converter W/ 4 Pin Wiring Harness * High Quality Taillight Converter* Converts 3-Wire System To 2-Wire Trailer Light Wiring * Potted Enclosure Significantly Increases Water And Vibration...$88.99 -
4-Way Flat License Plate Light Plug Adapter
CURT MANUFACTURING
$5.294-Way Flat License Plate Light Plug Adapter * High Quality License Plate Light Plug Adapter* Allows A 4-Way Flat Socket To Be Mounted In A License Plate Light Hole * 1-1/4 Inch Plug Fits A Typical License Plate Light Hole * Simple Plug-And-Play Design...$5.29