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 Aluminum Rear Sump Engine Oil Pan W/ Drain Plugs & Side Ports
BESTFIT TRUCK PARTS
$976.99BESTfit Sump Engine Oil Pan W/ 10 Mounting BoltsUpgrade your engine's oil management with our Sump Engine Oil Pan, crafted from durable aluminum with a sleek gray finish. This comprehensive kit includes drain plugs measuring 0.75 x 14.00 inches, side...$976.99 -
BESTfit Exhaust Manifold Kit, 3 Piece Late Style Big Cam / Small Cam Engines For Cummins NT855
BESTFIT TRUCK PARTS
$413.99BESTfit Exhaust Manifold Kit W/ Front Center & Rear SectionsUpgrade your exhaust system with our Exhaust Manifold Kit, designed to replace the 2-piece style manifold. This comprehensive kit includes front, center, and rear manifold sections along with a...$413.99 -
BESTfit Blue Hump Hose, 4 Inch I.D. x 8 Inch Length
BESTFIT TRUCK PARTS
$41.81BESTfit Blue Hump Hose For Charge Air Cooler Connections * High Quality Hump Hose* Blue* 4 Inch Id X 8 Inch Length* For Charge Air Cooler Connections* Made In USA* Sold Individually* Warranty On Hump Hoses Against Defects In Workmanship & Material From...$41.81 -
On Sale
BESTfit AC Compressor W/ 8 Groove 119MM Clutch, Single Male Packard Plug - Replaces A6110032-001, 4028, 4420
BESTFIT TRUCK PARTS
Now: $33.30Was: $221.99BESTfit AC Compressor W/ 8 Groove 119MM Clutch * High Quality A/C Compressor* With 8 Groove 119 MM Clutch * Multifit Application With A Single Male Packard Plug * With Single Male Bullet Connector * Sold Individually * Warranty On A/C Compressor Against...Now: $33.30Was: $221.99 -
BESTfit Sanden Style Ear Mount AC Compressor W/ 8 Groove 119MM Pulley
BESTFIT TRUCK PARTS
$182.99BESTfit AC Compressor Sanden Style Ear Mount W/ 8 Groove 119MM PulleyThis high-quality A/C compressor features an ear mount and a Sanden-style design. It comes equipped with an 8-groove 119mm pulley for efficient operation. * High Quality A/C Compressor...$182.99 -
BESTfit Exhaust Manifold Replaces 23516107 For Detroit Series 60 12.7L EGR
BESTFIT TRUCK PARTS
$534.99BESTfit Exhaust Manifold Fits Detroit Series 60 12.7LUpgrade your Detroit Series 60 engine with our Exhaust Manifold designed specifically for the 12.7L EGR model. Crafted for precision fitment and optimal performance, this aftermarket replacement part...$534.99 -
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 -
BESTfit Valve Side Camshaft For Cummins ISX With Single Camshafts - Replaces 3685964, 4298629
BESTFIT TRUCK PARTS
$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...$929.99