Semi-Truck Engine Parts
Explore a diverse range of new semi-truck engine parts at 4 State Trucks. Discover quality OE and aftermarket replacement filters, belts, sensors, flywheel components, and more online to ensure your engine runs smoothly. Elevate your truck's engine with our quality parts today!
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BESTfit Replacement Damper For Freightliner & International With CAT Engine
BESTFIT TRUCK PARTS
$510.99BESTfit Replacement Cat DamperEnhance your CAT engine's performance with our aftermarket CAT damper. Specifically designed to fit CAT 3406, 3408, and C15 models, this damper is sold individually for your convenience. It's crafted to meet or exceed OEM...$510.99 -
BESTfit AC Compressor With 6 Groove Clutch QP7H15-4425 Style - Replaces F69-6003121
BESTFIT TRUCK PARTS
$289.99BESTfit AC Compressor With 6 Groove Clutch Assembly For Kenworth & Peterbilt * High Quality AC Compressor* Replaces Sanden Type QP7H15-4425* Sold Individually* Warranty On AC Compressors Against Defects In Workmanship & Material From Date Of Purchase***...$289.99 -
BESTfit AC Compressor With Clutch Seltec QP7H15-4424 - Replaces F69-6001-122
BESTFIT TRUCK PARTS
$235.99BESTfit AC Compressor With 6 Groove Clutch Assembly For Paccar * High Quality AC Compressor* Replaces Sanden Type QP7H15-4424* Sold Individually* Warranty On AC Compressors Against Defects In Workmanship & Material From Date Of Purchase*** High Quality...$235.99 -
On Sale
BESTfit AC Compressor With Clutch For Freightliner, Sterling & Ford
BESTFIT TRUCK PARTS
Now: $53.28Was: $295.99BESTfit AC Compressor With 8 Groove Clutch Assembly for Freightliner & Ford * High Quality AC Compressor* Replaces Sanden Type SD7H15* Sold Individually* Warranty On AC Compressors Against Defects In Workmanship & Material From Date Of Purchase*** High...Now: $53.28Was: $295.99 -
BESTfit 90 Degree Oil Drain Valve Hose Adapter
BESTFIT TRUCK PARTS
$20.39BESTfit Oil Drain Valve Hose AdapterIntroducing our 90 Degree Oil Drain Valve Hose Adapter, a convenient aftermarket replacement part designed to screw into drain valves, providing a slide-on hose hookup. This adapter is compatible with the following...$20.39 -
BESTfit Oil Drain Valve Hose Adapter Straight
BESTFIT TRUCK PARTS
$14.27BESTfit Oil Drain Valve Hose AdapterIntroducing our Oil Drain Valve Hose Adapter, designed to fit the following valves: 29-072000, 29-072001, 29-072002, 29-072005, 29-072006, and 29-072007. Each adapter is sold individually, ensuring compatibility and...$14.27 -
BESTfit EZ Oil Drain Valve For Caterpillar Acert Engines
BESTFIT TRUCK PARTS
$56.09BESTfit EZ Oil Drain Valve For CAT Acert EnginesChanging your oil is made easier with the EZ Oil Drain Valve. Unlike spring-assisted gate valves, EZ Oil?s ball valve design allows for straight flow and fast drainage and is rated and tested up to 250 PSI...$56.09 -
BESTfit EZ Oil Drain Valve For Cummins, International, Mack & Volvo Engines
BESTFIT TRUCK PARTS
$56.09BESTfit EZ Oil Drain Valve For Cummins ISX, QSX15, NaviStar MaxxForce 13 & 15, Mack M-P10 & Volvo D-16 EnginesChanging your oil is made easier with the EZ Oil Drain Valve. Unlike spring-assisted gate valves, EZ Oil?s ball valve design allows for straight...$56.09 -
BESTfit EZ Oil Drain Valve For Caterpillar 3304, 3306, 3406, 3408, 3412, 3456, 3176, 3126 & C10-C18 Engines
BESTFIT TRUCK PARTS
$56.09BESTfit EZ Oil Drain Valve Fits C-10, C-11, C-12, C-13, C-15, C-16 & C-18 EnginesChanging your oil is made easier with the EZ Oil Drain Valve. Unlike spring-assisted gate valves, EZ Oil?s ball valve design allows for straight flow and fast drainage and...$56.09 -
On Sale
BESTfit AC Compressor With Clutch Replaces ABP N83 304543QS For Freightliner & Western Star
BESTFIT TRUCK PARTS
Now: $216.29Was: $308.99BESTfit AC Compressor With 8 Groove Clutch Assembly for Peterbilt, Freightliner & Sterling * High Quality AC Compressor* Refrigerant Type- R134A* Compatible Refrigerant Oil Type - PAG 46* Oil Filled- Yes* Pulley Groove Quantity- PV8* Terminal Type- Pin*...Now: $216.29Was: $308.99 -
BESTfit Aluminum Flywheel Housing For Cummins L10, M11 & ISM
BESTFIT TRUCK PARTS
$733.99BESTfit Flywheel SAE 2 With 17 Inch RingUpgrade your Cummins engine with our Aluminum Flywheel Housing designed to fit models L10, M11, and ISM. Featuring an SAE #1 size and compatible with SAE #2 17-inch ring flywheels (not included), this housing...$733.99 -
BESTfit Aluminum Flywheel Housing With 14MM Mounting Holes For Detroit 60 Series Engines
BESTFIT TRUCK PARTS
$893.99BESTfit Aluminum Flywheel Housing, Replaces 23522643Upgrade your engine with our aluminum Flywheel Housing! Specifically designed for use with the Detroit 60 Series, this aftermarket replacement part features 0.55-inch mounting holes and compatibility...$893.99