Engine Parts

Replacement Coolant Tube Lower Coolant Tube 2.5 OD To 3 Inch IDSwap out your old lower radiator pipe with this heavy-duty BESTfit stainless steel replacement for Peterbilt 357, 377, 378, and 379 trucks with a Cummins N14. Built with a 3-inch inlet, 2...

Peterbilt Replacement 4 Row Radiator CoreGet 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 inch tubes on 5/16 inch tube centers, along with...

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 conditions. Crafted from corrosion-resistant stainless steel,...

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. Manufactured to OE specifications this replacement 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 specifications this replacement coolant tube is...

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 Inch Thickness  - 37.5 X 6.5 Inch...

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 a precise fit, it ensures steady coolant flow to keep...

BESTfit Radiator Top Tank With Surge Tank Fits Peterbilt 379The Radiator Bolt On Top Tank, with its integrated Surge Tank, offers a convenient and easily assembled solution. This unit is specifically designed to fit Peterbilt 379 trucks equipped with...

BESTfit Peterbilt Radiator Tank Upper W/ Metal Top, 37 X 6.5 InchThe 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 robust metal top construction offers...

BESTfit Peterbilt Charge Air Cooler Lower 26.25 X 7.75 InchEnsure maximum cooling efficiency with the BESTfit Lower Charge Air Cooler, measuring 26.25 x 7.75 inches and built to deliver reliable performance for your turbocharged engine. Designed for a...

BESTfit Peterbilt High Performance 4 Row Dimpled Radiator CoreBoost your truck's cooling efficiency with the BESTfit High Performance 3 Inch Dimpled Radiator Core. Engineered with advanced dimpled technology, this radiator core enhances heat dissipation...

Replacement Stainless Steel Coolant Tube Fits PeterbiltEnsure reliable engine cooling with this BESTfit 2.5 Inch Stainless Steel Upper Coolant Tube, designed specifically for Peterbilt trucks equipped with Caterpillar engines. This high-quality coolant...