BESTfit 5 Inch Exhaust Y-Pipe Combo Fits Peterbilt 357 & 378 Passenger SideThe BESTfit 5 Inch Plain Economy Exhaust Y-Pipe Combo is an ideal replacement for Peterbilt 357 and 378 trucks with high mount passenger side exhaust systems. Designed to match OE...

Replacement Aluminized Steel Single Exhaust Pipe Fits PeterbiltThe BESTfit Aluminized Steel Exhaust Pipe is a high-quality replacement designed specifically to fit Peterbilt 387 models. Made from durable aluminized steel, this exhaust pipe features a...

BESTfit 23 Inch Long Turbo Down Pipe W/ 4 Inch OD & 3.85 Inch IDThe BESTfit Aluminized Turbo Down Pipe is a high-quality replacement designed for Peterbilt 386 trucks. Constructed from durable aluminized steel, this turbo down pipe features a 4-inch...

Upper Exhaust Mount Bracket For Driver Or Passenger SideThe BESTfit Driver or Passenger Side Upper Exhaust Mount Bracket is an essential replacement part engineered specifically for Peterbilt 388 and 389 trucks. Made from durable materials, this bracket...

Passenger Side Upper Exhaust Slider Clamp Replaces OE M16-6048R & M166048R By BESTfit* High Quality Slider Clamp Assembly* Designed For Use With 5 Inch Diameter Exhaust Stack* Includes:  - Clamp, 5 Inch Diameter  - Exhaust Mount With Poly...

Driver Side Upper Exhaust Slider Clamp Replaces OE M16-6048 & M166048 By BESTfit* High Quality Slider Clamp Assembly* Designed For Use With 5 Inch Diameter Exhaust Stack* Includes:  - Clamp, 5 Inch Diameter  - Exhaust Mount With Poly Bushing (3...

BESTfit Peterbilt Poly Exhaust Clamp Assy MountThe BESTfit 5 Inch OD Upper Exhaust Clamp Assembly with Poly Mount is a high-quality replacement part designed for Peterbilt 388 and 389 models. This exhaust clamp assembly features a durable poly mount that...

Engine Support Bracket Cat 3406 By BESTfitMaintain your Peterbilt truck's performance with the BESTfit Front Engine Mount Crossmember 05-15046M002, engineered for models 365, 367, 377, 378, 379, and 387 equipped with Cat engines. This professional-grade...

Replacement Frame Crossmember Gusset By BESTfitWhen frame components begin to wear or weaken, replacing them with properly engineered parts is essential, and the BESTfit Frame Crossmember Gusset offers a dependable solution for Peterbilt trucks. Built...

Replacement G86600440FE Air Tank By BESTfitKeep your Peterbilt 378, 379, 388, or 389 air system operating at peak efficiency with the BESTfit 10-inch OD x 40.625-inch Single Chamber Air Tank. Constructed from high-quality steel with black phosphate...

27.2 Inch Poly Torque Rod Cabin By BESTfitEnsure your Peterbilt cabin remains stable and vibration-free with the BESTfit 27.2 Inch Poly Torque Rod Cabin, designed as a direct replacement for TH7569000. This premium torque rod includes poly grommets to...

18 Inch Aluminum Battery Box Cover By BESTfit Fits PeterbiltMaintain battery protection and performance with the BESTfit Smooth Aluminum Battery Box Cover engineered for a wide range of Peterbilt models. Constructed from durable aluminum, this 18-inch...