Exhaust

BESTfit Driver Side Chrome Multi-Bend Exhaust Elbow For Bottom Of Muffler Fits 377 or 378 PeterbiltThis high quality chrome 5 inch O.D. inlet & outlet multi-bend exhaust elbow fits Peterbilt 377 driver side and is used for longer fuel tank options. This...

BESTfit Passenger Side 19 Inch Multi-Bend Exhaust Elbow For Bottom Of Muffler W/ 5 Inch O.D. Inlet & OutletThis Chrome-Plated steel mult-bend exhaust pipe has no weld seems between bends. The pipe is 19 inches long overall with a 5 inch O.D. inlet and...

BESTfit Aluminized Steel 90 Degree Exhaust Down PipeThe 5 Inch Multi-Bend Down Pipe is the go-to replacement for OE numbers 14-15073 & EP50-EL90124A, and it fits Peterbilt 357, 377, 378, and 379 models. Constructed from high-quality aluminized steel,...

Multi-Bend Turbo Pipe For PeterbiltRevitalize your Peterbilt's exhaust system with the BESTfit 5 Inch Multi-Bend Turbo Pipe from 4 State Trucks. Constructed from high-grade aluminum for maximum durability, this turbo pipe features a 5-inch flanged inlet...

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

Peterbilt Exhaust Bushing Kit With Sleeve By BESTfitThe BESTfit Exhaust Bushing Kit Upper With Sleeve is designed specifically for Peterbilt 388 and 389 models, providing a durable and reliable solution for exhaust mounting. This high-quality kit...

Aluminized Steel 75 Degree Exhaust Elbow W/ 5 Inch I.D. Inlet & 5 Inch O.D. OutletBoost your Peterbilt 377, 378, or 379's exhaust with the BESTfit 5 Inch 75 Degree Aluminized Exhaust Elbow from 4 State Trucks. Made of aluminized steel, this exhaust elbow...

BESTfit Exhaust Elbow Fits Peterbilt 378 & 379 Driver SideThis high-quality exhaust elbow is built from chrome-plated steel and features a durable multi-bend design engineered for smooth exhaust flow and long-lasting performance. Made for the driver side...

BESTfit Y-Pipe Fits PeterbiltTransform your Peterbilt's exhaust system with the BESTfit Chrome 6 Inch Y-Pipe, engineered for 378, 379, 389, and 389 Glider models. Made from chrome-plated steel, this Y-Pipe not only enhances your truck's appearance but...

BESTfit Y-Pipe Fits PeterbiltRevamp your Peterbilt's exhaust system with the premium BESTfit Chrome 7 Inch to 5 Inch Y-Pipe from 4 State Trucks. Crafted for the BESTfit long leg, this chrome-plated steel Y-Pipe transitions smoothly from 7 to 5 inches O.D...

BESTfit Exhaust Elbow Below Muffler Fits PeterbiltThis high quality 5 inch plain exhaust elbow fits Peterbilt passenger side. The elbow comes with a 1 year warranty.* High Quality Exhaust Elbow* 4 Bend* Plain With Flat Part For Below Muffler Mount* 5...

BESTfit Aluminized Steel 85 Degree Turbo Pipe With 5 Inch ODUpgrade your exhaust system with this BESTfit 85-Degree Turbo Pipe, designed to fit Peterbilt 357, 377, 378, and 379 models, replacing OE part number 14-13002. This aluminized steel pipe, with a...