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Semi Truck DPF Box Covers & Slipcovers: Fitment Guide(Post)
Semi Truck DPF Box Covers: Types, Fitment & Replacement What Is a DPF Box Cover on a Semi Truck? DPF box covers are exterior panels designed to conceal or protect the aftertreatment housing. They do n
Haul of Fame: Equipment Express's "Doc Holliday” A 2007 Peterbilt Legacy 379 Built to Legend(Post)Why "Doc Holliday" Earns a Spot in the Haul of Fame Every now and then, a truck rolls through that stops you dead in your tracks. "Doc Holliday," the custom 2007 Peterbilt Legacy 379 built by Equipmen
Best Semi Truck Accessories to Control Summer Heat in the Cab(Post)Keeping your Class 8 semi truck cab space cool and comfortable involves more than just blasting the A/C 24/7. In this post, we'll cover the best semi truck accessories help keep your cab cool and comf
Blatant Signs Your Turbocharger is Failing (And When to Replace it) (Post)If your semi truck turbocharger is failing, you'll encounter a few common signs. In this post, we'll cover what those are, and similar symptoms that aren't actually the turbo, but a related part. Sig
Semi Truck Exhaust Manifold Buyer's Guide(Post)This guide covers everything you need to know about aftermarket semi truck manifolds, alongside useful information about the various manifold brands we sell. After reading, you'll be able to accuratel
7 Best Exterior Chrome Upgrades for the Kenworth W900A(Post)Outfit your Kenworth W900A model with stunning exterior chrome accessories and stainless-steel upgrades that seamlessly tie together the entire truck’s theme. Classic big rig owners take a lot of prid
5 Killer Axle Cover Styles to Personalize Your Semi Truck(Post)Semi truck axle covers protect the exposed axle housing from dirt and road debris while offering some really awesome-looking styles. And unlike "bigger" aftermarket purchases, like bumpers or grilles,
Common Steering Problems on Peterbilt 379 Trucks(Post)Here are some of the most common steering problems found on older Peterbilt 379 models, how to diagnose those issues, and how to prevent them. Related Posts: How to Replace a Peterbilt Steering Shaf
Most Common Replacement Parts for Freightliner FL70(Post)Freightliner FL70/FL80 Business Class trucks see a lot of wear and tear while running job sites. The parts that risk quick replacement are those that see the most pressure and stress, like the suspens
The Best Exterior & Interior Tractor Trailer Accessories to Level Up Your Truck(Post)One of the best ways to start improving you rig's safety, comfort, and performance is by adding some aftermarket tractor trailer accessories, whether it's a set of pintle hooks for stronger towing or
Top Semi Trucks Owned in Each State (Data for All 50 States) (Post)Here's some visual data on the most commonly owned heavy duty semi truck models based upon three popular truck brands: Peterbilt, Kenworth, and Freightliner. DISCLAIMER: (as of 2025) this data is four
How to Find the Right FL70 Parts Using Your VIN(Post)To identify the right Freightliner FL70 parts, you must use your 17-digit VIN and the factory spec decal inside your cab, rather than relying on the exterior model badge. Because FL70 and FL80 Busines
What PSI Should Semi Truck Tires Be? (Post)Getting the right tire inflation pressure on your semi-truck can prevent underinflation (which wears down the tires and increasing rolling resistance) and overinflation (which leads to a blowout on th
What Should Be in a Semi Truck Emergency Kit? (Free PDF Checklist for Drivers)(Post)Semi-truck breakdowns cost money and time; but they aren't inevitable. With the right emergency accessories, truck drivers can minimize costly delays, tackle minor repairs on the fly, and safely power
Top 10 Semi Truck Winter Accessories for Heavy-Duty Drivers(Post)Winter truck driving can be downright trecherous to haul payloads in, especially when you don't have the right winter-ready trucker gear to get you through difficult drives in below-freezing temperatu
Haul of Fame: The Murder Pete Truck(Post)They call it the Murder Pete. Blacked-out, rugged, and raw, it’s a notorious big rig known for its “murdered out” style. Supported by the custom fab shop work of Chrome Shop Mafia (CMS) and supplied w
CB Radios Ultimate Guide(Post)“10-4 Roger.” Despite the rise of messaging apps, GPS devices with voice-activated messaging, and push-to-talk (PTT) apps, the classic CB radio remains among the most trusted and well-used accessorie
The Best Heavy Duty Shocks for Semi Trucks(Post)Aside from your truck's engine, heavy-duty shocks are among the most critical parts that affect ride quality, suspension performance, and the amount of wear on tires. Here’s a quick rundown of the bes
Essential Kenworth W900A Restoration Parts (100% Bottom-Up Rebuild)(Post)When restoring a classic Kenworth W900A from the 1960s or 1970s, the ultimate goal is honoring that legendary vintage aesthetic while ditching tired, road-worn, decades-old mechanical components. Semi
Best Peterbilt Chrome Upgrades (Interior & Exterior Cab)(Post)When it comes to upgrading your Peterbilt truck with chrome accessories, the aftermarket options are virtually endless. If you're looking to add a bit more personalization to your rig than the tradit
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High Flow Performance Air Filter With Washable Element Media For Volvo With EGR
FLEET FILTERS
$444.99High Performance Air Filter Media Fits Volvo With EGRYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air...29-071300030- SKU:
- 29-071300030
- Truck Class:
- Heavy Duty
- Make:
- Volvo
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Peterbilt & Kenworth
FLEET FILTERS
$444.99High Performance Air Filter Media Fits Peterbilt, KenworthYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high...29-071300024- SKU:
- 29-071300024
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Freightliner, Western Star
FLEET FILTERS
$585.99High Performance Air Filter Media Fits Freightliner, Western StarYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...29-071300044- SKU:
- 29-071300044
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$585.99Qty in Cart: 0Price:$585.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Volvo
FLEET FILTERS
$444.99High Flow Performance Air Filter With Washable Element Media Fits VolvoYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime,...29-071300018- SKU:
- 29-071300018
- Truck Class:
- Heavy Duty
- Make:
- Volvo
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Freightliner Cascadia 116/126
FLEET FILTERS
$585.99High Performance Air Filter Media, Replaces FA6102You never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air...29-071300036- SKU:
- 29-071300036
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$585.99Qty in Cart: 0Price:$585.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Mack
FLEET FILTERS
$444.99High Performance Air Filter Media Fits MackYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air filters...29-071300027- SKU:
- 29-071300027
- Truck Class:
- Heavy Duty
- Make:
- Mack
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For International 9000 Series & Peterbilt 348
FLEET FILTERS
$444.99High Performance Air Filter Media Fits International 9000 SeriesYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...29-071300015- SKU:
- 29-071300015
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For International WorkStar, ProStar
FLEET FILTERS
$444.99High Performance Air Filter Media Fits International WorkStar, ProStarYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime,...29-071300033- SKU:
- 29-071300033
- Truck Class:
- Heavy Duty
- Make:
- International
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Freightliner, International & Peterbilt
FLEET FILTERS
$444.99High Performance Air Filter Media, Replaces FA3516You never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air...29-071300007- SKU:
- 29-071300007
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter W/ Washable Element For Freightliner, Kenworth, Peterbilt & Western Star
FLEET FILTERS
$444.99High Performance Air Filter Fits Freightliner, Mack, Kenworth, Peterbilt, Western StarFleet Air Filters are durable, washable, and high-flow air filters that offer long-lasting performance. These...29-071300004- SKU:
- 29-071300004
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Freightliner Cascadia, Coronado, M2
FLEET FILTERS
$585.99High Performance Air Filter Media, Replaces FA6102You never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air...29-071300039- SKU:
- 29-071300039
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$585.99Qty in Cart: 0Price:$585.99Subtotal: -
FREE SHIPPING OVER $249
Cab Air Pre-Filter For Kenworth T800, W900B & W900
FREEDOM AIR FILTERS
$36.991986-2018 Fresh Air Filter Pre-Filter Fits Kenworth* High Quality Polyester And ABS Plastic Pre-Filter * 4 Mounting Screws Included* Color Black* UV Resistant* Sold Individually* Warranty On...02-091306- SKU:
- 02-091306
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Make:
- Kenworth
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$36.99Qty in Cart: 0Price:$36.99Subtotal: -
Gen III High Flow Performance Air Filter With Washable Element Media For Media Kenworth T660, T800, W900S
FLEET FILTERS
$585.99Gen III High Performance Air Filter Media Kenworth T660, T800, W900SYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...29-071300041- SKU:
- 29-071300041
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Engine Parts
$585.99Qty in Cart: 0Price:$585.99Subtotal: -
FREE SHIPPING OVER $249
Kenworth Chrome Cab Fresh Cabin Air Filter
CAB FRESH FILTER CO.
$48.79Kenworth Cab Fresh Air FilterKeep your cab smelling fresh with this highly efficient cab fresh air filter that mount next to your air cleaner. It prevents road grime and pollen from clogging your...02-091301- SKU:
- 02-091301
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Plastic/Poly
- Finish Options:
- Chrome-Plated
- Make:
- Kenworth
- Product Type:
- Interior
- Ready To Ship:
- Yes
$48.79Qty in Cart: 0Price:$48.79Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Freightliner, International & Ford
FLEET FILTERS
$443.99High Flow Performance Air Filter With Washable Element Media Fits Freightliner, InternationalYou never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the...29-071300012- SKU:
- 29-071300012
- Truck Class:
- Heavy Duty
- Make:
- Sterling
- Product Type:
- Engine Parts
$443.99Qty in Cart: 0Price:$443.99Subtotal: -
High Flow Performance Air Filter With Washable Element Media For Freightliner, Mack & Peterbilt
FLEET FILTERS
$444.99High Performance Air Filter, Replaces FA2680You never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable, high flow, air filters...29-071300001- SKU:
- 29-071300001
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Product Type:
- Engine Parts
$444.99Qty in Cart: 0Price:$444.99Subtotal: -
Gen III High Flow Performance Air Filter With Washable Element Media PACCAR T680, T880, 579
FLEET FILTERS
$585.99Gen III High Performance Air Filter Media PACCAR T680, T880, 579You never need to waste money on paper filters again! 4 State Trucks proudly offers Fleet Air Filters, the only lifetime, washable,...29-071300042- SKU:
- 29-071300042
- Truck Class:
- Heavy Duty
- Make:
- Peterbilt
- Make:
- Kenworth
- Product Type:
- Engine Parts
$585.99Qty in Cart: 0Price:$585.99Subtotal: -
FREE SHIPPING OVER $249
Kenworth Cab Fresh Replacement Filter
CAB FRESH FILTER CO.
$16.16Kenworth Replacement Cab Fresh FilterFind your replacement Cab Fresh Cabin Filter at 4 State Trucks for Kenworth semi trucks. A cab fresh filter helps remove odors, dust, pollen, and other airborne...02-091302- SKU:
- 02-091302
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Kenworth
- Product Type:
- Interior
- Ready To Ship:
- Yes
$16.16Qty in Cart: 0Price:$16.16Subtotal: -
Chrome Pre-Cleaner Engine Filter For Freightliner Conventional Classic, FLD120
CAB FRESH FILTER CO.
$74.99Chrome Pre-Cleaner Filter For Engine Fits Freightliner Classic, Classic XL & FLD120* High Quality Pre-Cleaner Filter* For Engine* Chrome* Filter Mounts On Center Of Cowling Below Windshield* Sold...03-091300001- SKU:
- 03-091300001
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Make:
- Freightliner
- Product Type:
- Engine Parts
$74.99Qty in Cart: 0Price:$74.99Subtotal: -
FREE SHIPPING OVER $249
Cab Fresh Replacement Filter For Peterbilt 357, 377, 378, 379 & 386
CAB FRESH FILTER CO.
$17.57Replacement Air FilterFind aftermarket CAB Fresh replacement filters for Peterbilt 375, 377 and 379 big rigs at 4 State Trucks. This filter limits the amount of diesel soot, reduces odors entering...01-091304- SKU:
- 01-091304
- Location:
- Made In USA
- Truck Class:
- Heavy Duty
- Material Options:
- Cloth
- Make:
- Peterbilt
- Product Type:
- Exterior
- Ready To Ship:
- Yes
$17.57Qty in Cart: 0Price:$17.57Subtotal: