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 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider Plate
BESTFIT TRUCK PARTS
$209.99BESTfit 3 X 10 X 12 Inch Aluminized Steel Universal Type A Y-Pipe With No Divider PlateIntroducing the Type A Y Pipe, an essential component for your exhaust system. This Y Pipe features a diameter of 3 inches, with dimensions of 12 inches wide and ten...$209.99 -
BESTfit 4 Inch O.D.-I.D. X 24 Inch 16 Gauge Aluminized Steel Tube
BESTFIT TRUCK PARTS
$49.20BESTfit 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...$49.20 -
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
$256.99BESTfit 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...$256.99 -
BESTfit 8 Inch I.D. X 8 Inch Length Coupler
BESTFIT TRUCK PARTS
$84.17BESTfit 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...$84.17 -
On Sale
BESTfit Y-Pipe Hanger Black Steel 7 Inch Kit For Long Drop Elbow Peterbilt 378, 379, 389 Glider
BESTFIT TRUCK PARTS
Now: $351.89Was: $390.997 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...Now: $351.89Was: $390.99 -
On Sale
BESTfit Y-Pipe Hanger Stainless Steel 7 Inch Kit For Long Drop Elbow Peterbilt 378, 379, 389 Glider
BESTFIT TRUCK PARTS
Now: $360.89Was: $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...Now: $360.89Was: $400.99 -
On Sale
BESTfit Y-Pipe Hanger Black Steel 6 Inch Kit For Long Drop Elbow Peterbilt 378, 379, 389 Glider
BESTFIT TRUCK PARTS
Now: $342.89Was: $380.996 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...Now: $342.89Was: $380.99 -
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
$377.99BESTfit 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...$377.99 -
BESTfit Exhaust Elbow Replaces 14-13845LC For Peterbilt 378, 379 Driver Side
BESTFIT TRUCK PARTS
$337.99BESTfit 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...$337.99 -
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
$305.99BESTfit 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...$305.99