Exhaust

BESTfit Poly Upper Exhaust Bushing Fits Peterbilt 388, 389 & 386The BESTfit Poly Upper Exhaust Bushing is a durable replacement part designed to fit Peterbilt 388, 389, and 386 models. Engineered to replace the OEM M13-6001 bushing, this high-quality...

BESTfit Aluminized Steel Exhaust Y-PipeUpgrade your Peterbilt 377, 378, 379, or 386's exhaust with the BESTfit 5 Inch Aluminized Y-Pipe Exhaust. Crafted from high-quality aluminized steel for superior durability and performance, this Y-Pipe features a 5...

BESTfit Long Elbow Under Exhaust Tee Fits PeterbiltThe BESTfit 5 Inch OD 90 Degree Lower Exhaust Elbow Below The Tee is a high-quality replacement designed specifically for Peterbilt 387 models. Made from durable aluminized steel, this exhaust elbow...

BESTfit Exhaust Y-PipeThe BESTfit 5 Inch Aluminized Y-Pipe Exhaust is a replacement for OE number 14-13055, crafted for Peterbilt's 377, 378 SBA/SFA, and 379 models. Constructed from aluminized steel and manufactured in the USA, it guarantees durability...

BESTfit Chrome Y-Pipe For Long Leg ElbowEnhance your Peterbilt's exhaust with the BESTfit Chrome Steel Y-Pipe, expertly designed to transition from 8 to 5 inches O.D. for a long leg elbow configuration. Made from high-quality chrome-plated steel, this...

BESTfit Chrome Plated Steel 90 Degree Long Drop Elbow, Reduced 8 Inch To 5 InchRevolutionize your Peterbilt 378 or 379's exhaust system with the BESTfit Chrome Plated Steel Long Drop Elbow. This premium elbow transitions from 6 inches to 5 inches OD,...

BESTfit Aluminized 409 Stainless Steel Exhaust Pipe Fits Peterbilt 389 Day CabThe BESTfit Aluminized Stainless Steel Exhaust Pipe is a premium replacement designed specifically for Peterbilt 389 Day Cab models. Constructed from durable 409 aluminized...

BESTfit Chrome Plated Steel 90 Degree Long Drop Exhaust ElbowTransform your Peterbilt 378 or 379 with the sleek and durable BESTfit 8 Inch Chrome Long Drop Elbow. This high-quality, chrome-plated steel elbow features a long drop style with a 90-degree...

BESTfit 5 Inch Aluminized Taper Lock T-Pipe For Long Drop Elbows For Use Without Flex PipeOptimize your truck's exhaust system with the BESTfit 5 Inch Aluminized Taper Lock Y Pipe, tailored for Peterbilt 378, 379, and 389 Glider models. This T-Pipe is...

BESTfit Chrome Plated Steel Long Drop Elbow, 6 To 5 InchElevate your Peterbilt's exhaust system with the BESTfit Chrome Plated Steel Long Drop Elbow from 4 State Trucks. Specially designed for the 378 and 379 models, this elbow reduces from 6 inches to 5...

BESTfit Chrome-Plated Steel Exhaust Y-Pipe W/ 5 Inch ID Inlet & 5 Inch O.D. OutletsIntroducing the BESTfit Chrome 5 Inch ID/O.D. Y Exhaust Pipe, a replacement for OE number 14-13055. Designed to fit Peterbilt 377, 378 SBA/SFA, and 379 models, this...

BESTfit 5 Inch Aluminized Y Pipe RH ComboThe BESTfit 5 Inch Aluminized Y Pipe RH Combo is a durable, high-quality replacement for your Peterbilt 387 exhaust system. Designed to replace OE part number 14-25077, this right-hand side Y pipe offers excellent...