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 Steel Oil Pan Replaces 3944258, 3974294 & 3948611 For Cummins ISL Engines
BESTFIT TRUCK PARTS
$189.99BESTfit Steel Oil Pan Fits Cummins ISL EnginesUpgrade your Cummins ISL engine with our Steel Oil Pan. Crafted to exact specifications, this aftermarket replacement part ensures reliable performance and durability. Engineered for a precise fit, it...$189.99 -
BESTfit 20 Inch OD Flywheel W/ 113 Teeth For CAT 3306, 3406B, 3406E Engines
BESTFIT TRUCK PARTS
$402.99BESTfit Flat Flywheel W/ 10 Inch Opening, 12 Bolt Holes, 1 Dowel Pin Hole For 15 Inch ClutchEnhance your vehicle's performance with our aftermarket Flywheel. Featuring a robust construction, this flywheel boasts a diameter of 20 inches, a 15-inch clutch,...$402.99 -
BESTfit Water Pump With Housing For Cummins ISX 15 Engines - Replaces 3687590
BESTFIT TRUCK PARTS
$456.99BESTfit Cummins ISX Engine Water Pump With HousingRestore optimal coolant flow in your engine with our Heavy Duty Water Pump, complete with housing for hassle-free installation. This aftermarket replacement part ensures reliable performance and...$456.99 -
BESTfit Replacement Turbocharger For Cummins B-Series Applications - Replaces 3538883, 3802882, 4033671
BESTFIT TRUCK PARTS
$369.99BESTfit Cummins B-Series Replacement TurbochargerExperience enhanced engine performance with our Heavy Duty Turbocharger designed for durability and reliability. Engineered to withstand temperatures up to 950 degrees, this turbocharger features a turbine...$369.99 -
BESTfit Water Pump For CAT 3406B, 3406C Engines - Replaces 7C4957 / 1354926
BESTFIT TRUCK PARTS
$444.99BESTfit Water Pump Fits Caterpillar 3406B, 3406C Engines With 74 Tooth 7.875 Inch Flat Gear - Replaces 1354926, 7C4957, 7C7019, OR8217Upgrade your engine's cooling system with our Water Pump, engineered for superior performance and reliability. Featuring...$444.99 -
On Sale
BESTfit Valve Side Camshaft For Cummins ISX With Single Camshafts - Replaces 3685964, 4298629
BESTFIT TRUCK PARTS
Now: $650.99Was: $929.99Looking to replace your injector side camshaft? Our aftermarket replacement part is tailored for ISX model engines with a dual camshaft setup, specifically serving as an injector camshaft. With no core required, this camshaft is sold individually and...Now: $650.99Was: $929.99Qty in Cart: 0Quantity:Price:Now: $650.99Was: $929.99Subtotal: -
BESTfit Injector Side Camshaft For Cummins ISX With Dual Camshafts - Replaces 3682142, 4101432
BESTFIT TRUCK PARTS
$1,131.99BESTfit Camshaft For Dual Camshaft Cummins ISX Engine - Injector SideLooking to replace your injector side camshaft? Our aftermarket replacement part is tailored for ISX model engines with a dual camshaft setup, specifically serving as an injector...$1,131.99 -
BESTfit Valve Side Camshaft For Cummins ISX With Dual Camshafts - Replaces 3680779, 4059170, 4059331, 4298626
BESTFIT TRUCK PARTS
$799.99BESTfit Camshaft For Dual Camshaft Cummins ISX Engine - Valve SideLooking for a replacement camshaft? Our aftermarket replacement part is precisely what you need. Designed as a dual camshaft for valve side applications in aftermarket Cummins ISX engines,...$799.99 -
BESTfit O-Ring Kit With Gaskets, Sealing Washers - 2 Of Each Size Seal
BESTFIT TRUCK PARTS
$22.43BESTfit O-Ring, Gasket & Seal Kit * High Quality O-Ring Kit * 2 Of Each Size Seal* Refrigerant Type: R12/R134A* Sold Individually* Warranty On O-Ring Kit Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...$22.43 -
BESTfit 8.875 X 7.875 X 1.1875 Inch Paper Cabin Air Filter Replaces X1987001, 4070948C1 For PACCAR HVAC
BESTFIT TRUCK PARTS
$18.35BESTfit Paper Cabin Air Filter Fits Peterbilt & Kenworth HVACLooking for a replacement in-cab filter? Our aftermarket replacement part is designed to fit your needs. With dimensions of 7 7/8 inches in length, 8 7/8 inches in height, and 1 3/16 inches in...$18.35 -
BESTfit AC Refrigerant PAG 100 Oil - 8 Oz.
AFTERMARKET
$14.27BESTfit 100 Viscosity PAG Oil For A/C * High Quality Oil* 8 Oz * Sold Individually* Warranty On Oil Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement Part (Not OEM)***width="1293" height="300" />$14.27 -
BESTfit 70 Amp 12V 4 Terminal Carrier Relay With Diode Protection - Replaces 10-00328-00
BESTFIT TRUCK PARTS
$27.53BESTfit 12V SPDT 70 Amp 4 Terminal Carrier Relay * High Quality Relay* Volts: 12V* Type: Spdt N.O.* Amps/Cfm/Btus: 70 Amp* Notes: 4 Terminal 2 Large 2 Small* Diode Protection: W/Diode* Sold Individually* Warranty On Relay Against Defects In Workmanship &...$27.53