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 Cab* High Quality Exhaust Pipe* 409 Aluminized Stainless Steel* Fits Day Cab* Made In The USA* Sold Individually* Warranty On Exhaust Pipes Against Defects In Workmanship &...

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 Combo* High Quality Exhaust Elbow* Exhaust Y-Pipe Elbow Right Hand Combo For 387* Sold Individually* Warranty on Exhaust Elbow Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket...

BESTfit 6 Inch Chrome Long Leg Elbow Reduces To 5 Inch O.D. W/ Tapered Top Fits Peterbilt 378, 379 & 389 GliderTransform your exhaust with the BESTfit 6 Inch Chrome Long Leg Elbow, compatible with Peterbilt 378, 379, and 389 Glider models. This...

BESTfit Exhaust Y-Pipe With Muffler Fits PeterbiltOptimize your Peterbilt's exhaust system with the BESTfit Steel Exhaust Y-Pipe, complete with a 9-inch muffler. This premium exhaust component is made from high-quality steel, offering unmatched longevity...

BESTfit Intermediate Pipe Plain Fits PeterbiltThis straight 5 OD x 18-inch chrome replacement pipe is designed for select Peterbilt 357, 378, and 379 trucks with dual exhaust systems above the frame. Crafted from premium materials, it promises durability...

BESTfit Muffler 55 Inch X 11 InchThis high quality 55 X 11 inch muffler fits Peterbilt 387 and Kenworth T2000 models. The muffler has an overall 5 inch ID and comes with a 1 year warranty.* High Quality Muffler* 11 Inch x 55 Inch x 61.5 Inch* Overall 5...