Peterbilt 357/378 Elbows, Piping & Comp.
Make upgrading your exhaust system a breeze with aftermarket universal elbows, piping and components for your Peterbilt 378. Find the perfect custom, chrome, and aftermarket exhaust pipes. Upgrade your Peterbilt exhaust without breaking the bank at 4 State Trucks.
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BESTfit 4 X 16 X 10.5 Inch Aluminized Steel Universal Type B Y-Pipe
BESTFIT TRUCK PARTS
$170.99BESTfit 4 X 16 X 10.5 Inch Aluminized Steel Universal Type B Y-PipeIntroducing our Y Pipe, crafted from durable aluminized steel for long-lasting performance. Featuring a Y-shaped design with dimensions of 4 inches in diameter, 10.5 inches in width, and...$170.99 -
BESTfit 3.5 To 3 Inch O.D.-ID X 8 Inch OAL Aluminized Steel Reducer Pipe
BESTFIT TRUCK PARTS
$25.69BESTfit 3.5 To 3 Inch O.D.-ID X 8 Inch OAL Aluminized Steel Reducer PipeIntroducing our Aluminized Steel Reducer, designed for exceptional performance and durability. With dimensions of 3.5 inches outside diameter reducing to 3 inches inside diameter and...$25.69 -
BESTfit 3.5 To 3 Inch ID-ID X 8 Inch OAL Aluminized Steel Reducer Pipe
BESTFIT TRUCK PARTS
$22.53BESTfit 3.5 To 3 Inch ID-ID X 8 Inch OAL Aluminized Steel Reducer PipeIntroducing our Aluminized Steel Reducers, crafted for durability and performance. These reducers feature dimensions of 3.5 inches inside diameter reducing to 3 inches inside diameter,...$22.53 -
BESTfit 4 Inch O.D.-I.D. X 24 Inch 16 Gauge Aluminized Steel Tube
BESTFIT TRUCK PARTS
$46.20BESTfit 4 Inch O.D.-I.D. X 24 Inch 16 Gauge Aluminized Steel TubeIntroducing our Straight Exhaust Tubing, expertly crafted from Aluminized 12 Gauge Steel for durability and longevity. With a 4-inch diameter and 24-inch length, it offers ample sizing for...$46.20 -
BESTfit 5 Inch ID-O.D. X 4 Inch OAL Aluminized Steel Type A Turbo Pipe With 5.25 Inch Diameter Flange For Detroit 6V/8V92T
BESTFIT TRUCK PARTS
$228.99BESTfit 5 Inch ID-O.D. X 4 Inch OAL Aluminized Steel Type A Turbo Pipe With FlangeIntroducing our machined Turbo Air Research T525-Style-B exhaust pipe, meticulously crafted for optimal performance. With a length of 4 inches and a diameter of 5 inches in...$228.99 -
BESTfit 8 Inch I.D. X 8 Inch Length Coupler
BESTFIT TRUCK PARTS
$75.88BESTfit 8 Inch I.D. X 8 Inch Length CouplerThe Coupler available is specifically designed with an 8-inch inner diameter (I.D.) and an 8-inch length, offering a secure connection between compatible components. Sold individually, it serves as an...$75.88 -
BESTfit DPF Filter Clamp - Replaces 2871863 & 21445455
BESTFIT TRUCK PARTS
$64.25BESTfit Filter Clamp For DPFIn need of a filter clamp? Our aftermarket replacement part, sold individually, is here for you. It seamlessly replaces OE numbers 2871863 and 21445455, ensuring your vehicle's filter is securely held in place. * Filter Clamp*...$64.25 -
BESTfit Exhaust Elbow Replaces 14-13845RC For Peterbilt 378, 379 Passenger Side
BESTFIT TRUCK PARTS
$305.90BESTfit Exhaust Elbow Fits Peterbilt 378 & 379Upgrade your vehicle's exhaust system with our premium aftermarket Exhaust Elbow designed for the passenger side! Crafted from durable chrome-plated steel, this replacement part ensures both style and...$305.90 -
BESTfit Exhaust Elbow Replaces 14-13845LC For Peterbilt 378, 379 Driver Side
BESTFIT TRUCK PARTS
$296.99BESTfit Exhaust Elbow Fits Peterbilt 378 & 379 Driver SideUpgrade your vehicle's exhaust system with our premium aftermarket Exhaust Elbow for the driver's side! Crafted from durable chrome-plated steel, this replacement part ensures both style and...$296.99 -
BESTfit 2.5 X 14.75 Inch Flex Connector W/ Flange Replaces M666559 For Kenworth & Peterbilt
BESTFIT TRUCK PARTS
$147.99SS 12 3/4 Inch DPF Flex ConnectorPresenting our Connector, meticulously crafted in the USA to meet your vehicle's needs. With a 2.5-inch flange by 2.5-inch flange, compressed to 12.750 inches, this aftermarket replacement part ensures a precise fit in...$147.99 -
BESTfit 5 Inch X 14.5 Inch Bead Flex Connector W/ Flange Replaces M6665420335 For Kenworth & Peterbilt
BESTFIT TRUCK PARTS
$272.99BESTfit Stainless Steel 14.5 Inch Long DPF Flex Connector PipeIntroducing our Flex Connector, crafted in the USA with precision and care. This aftermarket replacement part boasts a 5-inch flange by 5-inch flange, compressed to 14.500 inches, ensuring a...$272.99 -
BESTfit 4 X 11.375 Inch Flex Connector Replaces M66-6541-0320 For Kenworth & Peterbilt
BESTFIT TRUCK PARTS
$199.99BESTfit DPF Exhaust Flex Connector PipeOur Flex Connector, crafted in the USA, boasts a 4-inch flange by 4-inch flange dimension, compressed to 11.375 inches. Ensuring top-notch quality, it's sold individually as an aftermarket replacement part,...$199.99