Engine Parts

Replacement Stainless Steel 2.5 Inch Coolant Tube Fits PeterbiltReplace worn or damaged coolant components with this BESTfit Stainless Steel 2.5 Inch Upper Coolant Tube, designed to fit Peterbilt models using Caterpillar engines. With a rugged stainless...

Driver Side SS 4.5 Inch Dia. Charge Air Cooler TubeThis driver side 4.5 Inch Diameter stainless steel charge air cooler tube fits 1967 - 1987 Peterbilt 359 models. It is used to cool the engine intake air after it passes through the turbocharger to...

Replacement 2.5 Inch Lower Coolant Tube Fits Peterbilt 579 & 587Keep your engine's cooling system performing at its best with this BESTfit 2.5 Inch Lower Coolant Tube, designed to replace OEM part F66-2560-200. Built for strength and durability, this...

Replacement Coolant Tube Fits PeterbiltReplace worn-out or rusted components with this BESTfit 3 Inch Stainless Steel Coolant Tube, engineered to match OE part numbers PB6152 and F66-6152. Crafted from premium stainless steel, this coolant tube offers...

Replacement Coolant Tube Fits PeterbiltKeep your cooling system performing at its best with this BESTfit 2.5 Inch Stainless Steel Coolant Tube, designed to replace OE numbers PD0706902 and 07-06902. Built from high-quality stainless steel, this tube...

BESTfit Charge Air Cooler Kit Fits PeterbiltThis aftermarket Peterbilt 357, 362, 377, 378, and 379 Super Duty Charge Air Cooler Kit is tested and designed to replace your OE 0514968, 0515020M, 0516674, 0516676L, or other factory style charge air coolers...

Replacement Driver Side Stainless Steel Charge Air Cooler Pipe With 4 1/2 Inch DiameterRestore your engine's performance and durability with this BESTfit 304 Stainless Steel Charge Air Cooler Pipe for the driver side, designed to replace OEM part...

Coolant Tube Fits Peterbilt 357, 377, 378 & 379 W/ CAT EngineBuilt to last, this BESTfit 2.5 Inch Stainless Steel Coolant Tube delivers reliable performance and enhanced corrosion resistance for your truck's cooling system. Its strong construction...

BESTfit Peterbilt Gasket For Radiator CoreAre you working on a radiator project? 4 State Trucks offers this aftermarket replacement gasket for a radiator core which is available with a one year warranty from the date of purchase.* High Quality Gasket*...

BESTfit Charge Air Cooler Super Duty Kit Fits PeterbiltThis aftermarket Peterbilt Super Duty Charge Air Cooler Kit is tested and designed to replace your OE 05-18730, 05-18731, 05-18751, 07-06657A, or other factory style charge air coolers. This super...

Passenger Side SS 4.5 Inch Dia. Charge Air Cooler TubeThis passenger side 4.5 Inch Diameter stainless steel charge air cooler tube fits 1967 - 1987 Peterbilt 359 models. It is used to cool the engine intake air after it passes through the turbocharger to...

Replacement Radiator Support RodStrengthen your truck's cooling system with the BESTfit Radiator Support Rod, designed to provide sturdy support and reduce radiator movement during heavy-duty operation. Crafted from durable materials for long-lasting...