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 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 Y-Pipe Hanger Black Steel 7 Inch Kit For Long Drop Elbow Peterbilt 378, 379, 389 Glider
BESTFIT TRUCK PARTS
$325.997 Inch Black Steel Y-Pipe Hanger KitIntroducing our Y-Pipe Hanger Bracket Kit, essential for Peterbilt trucks equipped with a 7-inch long drop 90-degree elbow and full-size exhaust tee. This kit includes all you need for installation: two black steel...$325.99 -
BESTfit Y-Pipe Hanger Stainless Steel 7 Inch Kit For Long Drop Elbow Peterbilt 378, 379, 389 Glider
BESTFIT TRUCK PARTS
$400.997 Inch Stainless Steel Y-Pipe Hanger KitIntroducing our Y-Pipe Hanger Bracket Kit, a perfect solution for Peterbilt trucks equipped with a 7-inch long drop 90-degree elbow and full-size exhaust tee. This kit includes two stainless steel exhaust tee pipe...$400.99 -
BESTfit Y-Pipe Hanger Black Steel 6 Inch Kit For Long Drop Elbow Peterbilt 378, 379, 389 Glider
BESTFIT TRUCK PARTS
$317.996 Inch Black Steel Y-Pipe Hanger KitIntroducing our Y-Pipe Hanger Bracket Kit, complete with all the necessary mounting hardware. Specifically designed for Peterbilt trucks equipped with a 6-inch long drop 90-degree elbow and full-size exhaust tee, this...$317.99 -
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 -
BESTfit 5 Inch Turbo Pipe Replaces 14-15329 For Peterbilt 377, 378 & 379
BESTFIT TRUCK PARTS
$166.99BESTfit Turbo Pipe Fits PeterbiltUpgrade your turbo system with our Turbo Pipe, expertly crafted from durable aluminized steel for long-lasting performance. Featuring a 5-inch flanged inlet and a 5-inch outer diameter outlet, this pipe ensures optimal...$166.99