Peterbilt 357/378 Parts
Find the best Peterbilt 378 aftermarket parts in the business here at 4 State. The Peterbilt 378 semi truck represents all of the characteristics of the Peterbilt brand, and was a popular model with similar features to the Peterbilt 379. Pete truck models are a brand of choice for experienced truckers who need dependable semi trucks. 4 State Trucks has all the semi truck parts and accessories you need to make your Pete 378 stand out to showcase your unique personality. Whether you need aftermarket bumpers, exhaust, or fuel tanks, we've got you covered. Hit the open road in style and comfort with the best custom gear for your Peterbilt heavy duty truck or 18 wheeler.
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Heavy Duty Diesel Oxidation Catalyst, Replaces 2888262NX For Cummins ISX 15.0L
DAYTON / DORMAN
$3,414.99Heavy Duty Diesel Oxidation Catalyst * High Quality Diesel Oxidation Catalyst* Includes:- 1 Diesel Oxidation Filter- 2 Gaskets* Natural Color* Regular Grade * Standard Replacement* Not For Sale In California* Sold Individually* Warranty On Diesel...$3,414.99 -
13.38 Inch Diameter Heavy Duty Diesel Oxidation Catalyst, Replaces 2888247NX For Cummins ISX 15.0L
DAYTON / DORMAN
$3,611.99Heavy Duty Diesel Oxidation Catalyst - Replaces 2888247NX, 4965304NX & A035W856 * High Quality Diesel Oxidation Catalyst* For Trucks Equipped With Cummins IS X 15.0 Liter * 13.38 Inch Diameter * Includes: - 1 Diesel Oxidation Filter - 2 Gaskets* Not For...$3,611.99 -
Exhaust Flex Bellows Kit Replaces M66-3541, M66-4111 For Peterbilt & Kenworth
DAYTON / DORMAN
$570.99Exhaust Pipe Bellow Kit * High Quality Exhaust Bellows Kit* Metal Material* 3.5 Inch Inside Diameter* 12.5 Inch Length- 1 Exhaust Bellow- 2 Clamps- 2 Gaskets* Sold As Kit* Warranty On Exhaust Bellows Kit Against Defects In Workmanship & Material From...$570.99 -
Chrome 90 Degree Exhaust Elbow, 7 Inch OD To 5 Inch ID
BESTFIT TRUCK PARTS
$645.9916 Inch End To End 90 Degree Chrome Elbow * High Quality Elbow* Chrome-Plated * 7 Inch OD * 5 Inch ID* 90 Degree* With 16 Inch End To End Measurement Both Horizontally And Vertically* 16 Gauge* Sold Individually* Warranty On Elbows Against Defects In...$645.99 -
Galvanized Type 1 Resonator Muffler W/ 4 Inch ID Inlet & Outlet
BESTFIT TRUCK PARTS
$102.9916.5 Inch Galvanized Resonator Muffler, 9 Inch Body Diameter * High Quality Resonator Muffler * Galvanized* 10 Inch Body Length * 16.5 Inch Overall Length * 9 Inch Body Diameter * 4 Inch ID Inlet * 4 Inch ID Outlet* Sold Individually* Warranty On...$102.99 -
BESTfit Aluminized 5 ID X 51 In. Straight Muffler Eliminator Pipe
BESTFIT TRUCK PARTS
$142.995 ID x 51 Inch Muffler EliminatorCheck out this BESTfit muffler eliminator pipe from 4 State Trucks! Made of durable aluminized steel, this pipe fits in place of a standard muffler. It has a 5 inch inside diameter and is 51 inches long. Upgrade today for...$142.99 -
Exhaust Clamp Replacement Bolt Kit 18-8 Stainless Steel
AFTERMARKET
$8.66Replacement Cinch Bolt * Made Of High Quality Stainless Steel* Sold As Kit* Kit Includes One Of Each- 3/8-16 X 3 Carriage Bolt- 3/8 Flat Washer- 3/8 Lock Washer- 3/8-16 Nut*** High Quality Aftermarket Replacement Part (Not OEM)***$8.66 -
Chrome Turn Out Top Stack, 4 Inch ID
BESTFIT TRUCK PARTS
$175.994 Inch ID Turn Out Top Stack * High Quality Top Stack* Chrome-Plated * 4 Inch ID* 48 Inch Length* Turn Out* Sold Individually* Warranty On Top Stacks Against Defects In Workmanship & Material From Date Of Purchase*** High Quality Aftermarket Replacement...$175.99 -
5 Inch Lincoln Chrome Plated Stainless Steel Wide Exhaust Clamp With Universal Bracket
LINCOLN CHROME
$151.995 Inch Lincoln Chrome Plated Stainless Steel Wide Exhaust Clamp With Universal Bracket * High Quality Clamp* Made Of Chrome-Plated Stainless Steel* 5 Inch Wide Style * Universal 2 Bolt Mount* Sold Individually* Made In USA* Warranty On Clamps Against...$151.99 -
8 Inch Lincoln Chrome Plated Stainless Steel Narrow Exhaust Clamp With No Bracket
LINCOLN CHROME
$77.79Lincoln Chrome Narrow Exhaust Clamp With No Bracket * High Quality Clamp* Made Of Chrome-Plated Stainless Steel* 8 Inch Narrow Style * No Bracket Clamp* Sold Individually* Made In USA* Warranty On Clamps Against Defects In Workmanship & Material From...$77.79 -
6 To 5 Inch 90 Degree 23 X 23 Inch Chrome Exhaust Elbow With Tapered Top
LINCOLN CHROME
$469.99Lincoln Chrome Elbow 90 Degree With Tapered Top Chrome Plated Steel * High Quality Elbow* Made Of Chrome-Plated Steel* 6 Inch OD * 90 Degree Universal Elbow* With Tapered Top For OD Stacks* Leg Length- 23 Inch Upper- 23 Inch Lower* Bottom Reduces to 5...$469.99 -
6 To 5 Inch 90 Degree 15 X 15 Inch Chrome Exhaust Elbow With Tapered Top
LINCOLN CHROME
$469.99Lincoln Chrome Elbow 90 Degree With Tapered Top Chrome Plated Steel * High Quality Elbow* Made Of Chrome-Plated Steel* 6 Inch OD * 90 Degree Universal Elbow* With Tapered Top For OD Stacks* Leg Length- 15 Inch Upper- 15 Inch Lower* Bottom Reduces To 5...$469.99