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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570 Slack Reducing Coupling
PREMIER
$933.99570 Slack Reducing Coupling * High Quality Slack Reducing Coupling* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 20000 Lbs.* Max. Eye X-Section 1-13/16 Inch* Minimum Eye Opening 2-3/8 Inch* Do Not Weld On...$933.99 -
370BC Slack Reducing Coupling Kit
PREMIER
$1,134.99370BC Slack Reducing Coupling Kit * High Quality Slack Reducing Coupling Kit* Includes:- Coupling- Bolt Kit- Air Chamber - Thimble* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 20000 Lbs.* Max. Eye...$1,134.99 -
370B Slack Reducing Coupling
PREMIER
$970.99370B Slack Reducing Coupling * High Quality Slack Reducing Coupling* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 20000 Lbs.* Max. Eye X-Section 1-13/16 Inch* Minimum Eye Opening 2-3/8 Inch* Do Not Weld On...$970.99 -
370K Coupling Replacement Part Kit
PREMIER
$334.99370K Coupling Replacement Part Kit * High Quality Coupling Replacement Parts Kit* Includes:- Locknuts- Locking Pawl- Pawl- Spring- Spacer- Bolts - Latch And Spring* Made In USA* Sold Individually* Warranty On Coupling Replacement Parts Kits Against...$334.99 -
370A Slack Reducing Coupling Kit
PREMIER
$957.99370A Slack Reducing Coupling Kit * High Quality Slack Reducing Coupling Kit* Includes:- Coupling- Bolt Kit- Air Chamber- Air Chamber Adapter Bracket - Thimble* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity...$957.99 -
370 Slack Reducing Coupling
PREMIER
$742.99370 Slack Reducing Coupling * High Quality Slack Reducing Coupling* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 20000 Lbs.* Max. Eye X-Section 1-13/16 Inch* Minimum Eye Opening 2-3/8 Inch* Do Not Weld On...$742.99 -
270 Coupling Replacement Part Kit
PREMIER
$248.99Coupling Part Kit W/ Latch, Pawl, Spring, Set Screw, Bolt, Locknut, Pin, Retaining Rings * High Quality Coupling Replacement Parts Kit* Includes: - Latch- Pawl- Spring- Set Screw- Bolt- Locknut- Pin And Retaining Rings* Made In USA* Sold Individually*...$248.99 -
270 Low Profile Slack Reducing Coupling
PREMIER
$758.99270 Low Profile Slack Reducing Coupling * High Quality Slack Reducing Coupling Kit * Includes:- Coupling- Bolt Kit- Air Chamber- Air Chamber Adapter Bracket- Thimble* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch...$758.99 -
270 Slack Reducing Coupling
PREMIER
$590.99270 Slack Reducing Coupling * High Quality Slack Reducing Coupling* Max. Gross Trailer Weight 90000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 12000 Lbs.* Max. Eye X-Section 1-13/16 Inch* Minimum Eye Opening 2-3/8 Inch* Do Not Weld On...$590.99 -
SAF-TITE 100-3 Slack Reducing Coupling Kit
PREMIER
$488.99SAF-TITE 100-3 Slack Reducing Coupling * High Quality Coupling Kit * Includes:- Coupling- Bolt Kit- Air Chamber- Air Chamber Adapter Bracket- Thimble* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 18000 Lbs.* Ultimate Latch Capacity 20000 Lbs...$488.99 -
SAF-TITE 100-3 Slack Reducing Coupling
PREMIER
$360.99SAF-TITE 100-3 Slack Reducing Coupling * High Quality Slack Reducing Coupling* Max. Gross Trailer Weight 100000 Lbs.* Max. Tongue Weight 18000 Lbs. * Ultimate Latch Capacity 20000 Lbs.* Max. Eye X-Section 1-13/16 Inch* Minimum Eye Opening 2-3/8 Inch* Do...$360.99 -
Air Adjusted Couplings Replacement Part Kit
PREMIER
$128.99Air Adjusted Couplings Replacement Part Kit * High Quality Couplings Replacement Parts Kit* Includes:- Spring- Thimble- Bolt- Locknut And Shoe* Made In USA* Sold Individually* Warranty On Couplings Replacement Parts Kits Against Defects In Workmanship &...$128.99