Engine Parts

Coolant Tube Fits Peterbilt 357, 377, 378 & 379 W/ CAT EngineImprove your truck's cooling system with this BESTfit 3 Inch Stainless Steel Coolant Tube, designed for durability and reliable...

BESTfit Peterbilt 4 Row Radiator CoreRestore your truck's cooling efficiency with the BESTfit High Performance 4-Row Radiator Core, sized at 41.5 by 34.5 inches. Its four-row construction maximizes...

Peterbilt Radiator Mount Bushing Replaces 07-05861, D84 RM75-63861, RM7563861 By BESTfitEnsure reliable radiator mounting on Peterbilt models 357, 359, 362, 377, 378, 379, and 385 with the BESTfit 1...

Replacement Coolant Tube Lower Coolant Tube 2.5 OD To 3 Inch IDMaintain the efficiency of your Peterbilt 357, 377, 378, or 379 with the BESTfit Stainless Steel Lower Radiator Pipe, engineered for...

Bolt-In Radiator Core By BESTfitGet your new Peterbilt 375, 377, 378, 379 radiator core today at 4 State Trucks! The BESTfit Radiator Core for Class 8 vehicles features a design with 4 rows of 1/2...

Replacement Coolant Tube Fits PeterbiltEnsure consistent cooling performance with this BESTfit 3 Inch Stainless Steel Coolant Tube, designed for durability and reliable operation in demanding...

2.5 Inch Upper Coolant Tube Fit PeterbiltThis aftermarket Peterbilt 357, 378, and 379 Stainless Steel Upper Coolant Tube is designed to replace your OE 05-19262 factory style coolant tube...

Lower Coolant Tube Fits PeterbiltThis aftermarket Peterbilt 357, 378, and 279 Stainless Steel Lower Coolant Tube is designed to replace your OE 07-06464 factory style coolant tube. Manufactured to OE...

BESTfit 36.25 X 34.5 X 3.4375 Inch 11 FPI 6 Row Dimpled Tube Radiator Core* High Quality Radiator Core* R Style* 6 Row Core* Dimpled Tube* Dimensions  - 36.25 Inch Height  - 34.5 Inch Width  - 3.4375...

Replacement Peterbilt Coolant TubeThis BESTfit Stainless Steel 2.5 to 3 Inch Coolant Tube offers a durable and corrosion-resistant solution for connecting different coolant hose sizes. Engineered for...

Bolt-On Radiator Metal Surge Tank W/ 2.5 Inch Inlet By BESTfit Replaces 07-06602The Radiator Bolt On Top Tank, with its integrated Surge Tank, offers a convenient and easily assembled solution. This...

Radiator Upper Tank 3 Inch OD Driver Side By BESTfitThe BESTfit Radiator Tank Upper with metal top is a durable and reliable replacement part designed for trucks requiring a 37 x 6.5 inch tank. Its...