When you run a Peterbilt 389, you already know it isn't just a truck — it's a statement. From the long-nose profile to the chrome stacks, the 389 is the pinnacle of classic American trucking. But none of that matters if your Peterbilt 389 front fender is cracked, faded, or just dragging down the look of your whole rig. At Bad Ass Custom Truck Parts, we manufacture Peterbilt 389 fiberglass front fenders right here in the USA, using our proprietary ArmorCore technology — engineered for drivers who take as much pride in how their truck looks as in how many miles it runs.
Whether you need a straight OEM-style replacement that bolts right in or a custom short-sidewall set that lowers your truck's stance and turns heads at every truck show, we have the fender for your 389. Every set ships as a matched pair with freight included — no hidden costs, no guesswork.
Why the Peterbilt 389 Demands a Better Front Fender
The Peterbilt 389 has been in production since 2007, building on the legacy of the iconic 379. It's the truck of choice for owner-operators who want a classic look with modern powertrain options. But that exposed front fender position — sitting right above the drive axle, catching road debris, gravel, salt spray, and UV exposure — means fenders take a constant beating.
OEM fiberglass fenders from the factory hold up reasonably well, but they are not designed with longevity as the priority. Over time, the leading edge cracks from stone impacts, the mounting flanges flex and fatigue, and the gel coat fades to a chalky finish. When that happens, you have two options: replace with a stock unit and do it again in a few years, or upgrade to an ArmorCore set and put the problem behind you permanently.
Our Peterbilt 389 front fender sets are built with a reinforced fiberglass matrix that adds material exactly where standard fenders fail — the leading edge and the mounting flange. The result is a fender that handles the same abuse but lasts significantly longer, holds its finish better, and still looks sharp when you pull into a truck stop at mile 500,000.
Sidewall Options: Choosing the Right Profile for Your 389
One of the most important decisions when ordering a Peterbilt 389 front fender set is the sidewall depth. The sidewall is the vertical section of the fender that wraps down toward the tire. Different depths change the look and the coverage your truck has over the tire width.
We offer three sidewall options for the 389:
Short Sidewall — 3.5 Inch
The Peterbilt 389 short sidewall front fender is the most popular choice among owner-operators building a show truck or custom rig. The shallower sidewall gives the 389 a more aggressive, slammed look that emphasizes the height of the truck. It works best with standard-width steer tires and is the fender profile you see most often at events like the Shell Rotella SuperRigs competition.
Medium Sidewall — 4.5 Inch
The medium 4.5-inch sidewall is our most versatile option. It provides more coverage over wider tires while still offering a custom look that sets it apart from the factory fender. The Peterbilt 389 medium sidewall front fender set is the right call if you run wide-base steer tires or want the added coverage of a deeper sidewall without going all the way to the long profile.
Long Sidewall — 7.5 Inch
The long 7.5-inch sidewall is designed for maximum coverage and a traditional look. If your 389 is a vocational truck — running in conditions where debris, mud, or material spatter is a constant factor — the Peterbilt 389 long sidewall front fender gives you the most protection while still looking far better than a battered OEM unit. It also suits drivers who prefer the classic, full-coverage look of older Pete styling.
Not sure which sidewall is right for your rig? Measure your current fender from the top of the crown to the bottom of the sidewall, or simply call our team at 812-523-2228 and we will confirm the right option before your order ships.
OEM Replacement vs. Custom Upgrade — Both Options, Same Quality
Not every 389 owner needs a custom profile. Some trucks are working trucks — they haul freight, hit tight schedules, and need a fender that bolts in without complications. For those applications, our stock OEM-style Peterbilt 389 replacement front fender set replicates factory dimensions exactly. The hole patterns match factory brackets, the contour matches the cab profile, and installation is straightforward for any shop that has done it before.
The advantage over buying direct from Peterbilt or a dealer is simple: our OEM-style Peterbilt 389 front fender replacement uses ArmorCore fiberglass construction instead of standard layup. That means you get the same fitment and look as the factory part, but the durability profile of a premium aftermarket fender — all at a price that comes in well below dealer pricing.
For drivers who want to go custom, our short and medium sidewall sets change the stance and character of the truck visually without requiring bracket modifications on most 389 configurations. These are the fenders you see on trucks that win at shows — clean lines, tight fitment, and a profile that makes the 389 look like it was designed with that fender from the factory.
ArmorCore Technology: What Makes Our Fiberglass Different
The word 'fiberglass' covers a wide range of quality levels in the semi truck parts market. Basic polyester fiberglass — used by many budget suppliers — is inexpensive to produce, but it cracks easily under impact, absorbs moisture over time, and fades quickly in UV exposure. You can find this type of fender at rock-bottom prices online, and most truckers who buy them end up replacing them within a few years.
ArmorCore is our proprietary reinforced fiberglass construction system developed specifically for high-stress trucking applications. Here is what makes it different:
• Reinforced leading edge — the section of the fender most exposed to stone chips and road debris receives additional material layup, making it significantly more resistant to impact cracking.
• Flex-resistant mounting flange — the holes where the fender bolts to the bracket are reinforced to prevent the cracking and star-pattern fractures that appear on standard fenders over time.
• UV-stabilized gel coat — the outer surface uses a UV inhibitor additive in the gel coat formulation, which dramatically slows the chalking and fading process compared to standard gel coats.
• Primer-ready finish — the surface accepts automotive paint directly after light sanding and a filler primer coat, giving you a clean base for any custom paint or match to your truck's existing color.
• Weight advantage — ArmorCore fiberglass is lighter than stainless steel fenders by a meaningful margin, which matters when you are maximizing payload on every run.
The result is a fender that looks better, installs cleanly, and holds up to the rigors of professional trucking without requiring frequent replacement. It is the reason our products carry a lifetime warranty and the reason we have over 5,000 customers who have run our fenders on their rigs.
What's Included in Every Peterbilt 389 Front Fender Set
Every order ships as a complete matched pair — driver side and passenger side — so you get consistent profile, consistent finish, and consistent fitment on both sides of the truck. Here is exactly what you receive:
|
Item |
Detail |
|
Pieces per set |
2 (matched pair — driver & passenger) |
|
Material |
ArmorCore reinforced fiberglass |
|
Finish |
Primer-ready UV-stabilized gel coat |
|
Paint compatibility |
Accepts all automotive paint systems |
|
Mounting |
Pre-drilled to factory hole pattern |
|
Shipping |
Freight included — no extra charge |
|
Packaging |
Custom pallet — protected for transit |
|
Warranty |
Lifetime manufacturer warranty |
Installation: What to Expect
Installing a Peterbilt 389 front fender set is a straightforward job for any truck shop familiar with Pete front ends. The process typically takes two to four hours for a pair, depending on whether you are removing an existing fender or installing on a new build.
For our OEM-style replacement fender sets, the hole pattern aligns directly with factory brackets on the 389. For custom sidewall sets, the mounting holes are pre-drilled and typically align to the same bracket positions, though some builds may require minor bracket adjustment depending on the specific configuration of your truck.
We recommend the following steps for a clean installation:
• Remove the existing fender and clean the bracket mounting surfaces.
• Dry-fit the new fender to confirm hole alignment before drilling or modifying anything.
• Use stainless steel hardware to prevent corrosion at the mounting points.
• If painting prior to install, allow full cure time before bolting up — typically 48 to 72 hours depending on the paint system.
• Apply a bead of silicone sealant at the bracket interface to prevent water intrusion and vibration noise.
If you need help finding a shop familiar with fiberglass fender installation, our Trusted Installers page lists shops across the country that have worked with our products. You can also call our team — we have talked through thousands of installations and can answer specific questions about your truck's configuration.
Peterbilt 389 Front Fender vs. Stainless Steel: Making the Right Choice
Some 389 owners weigh up fiberglass against stainless steel fenders before making a purchase decision. Both materials have genuine strengths, and the right answer depends on how you use your truck.
Stainless steel fenders — particularly from brands like Hogebuilt — are extremely durable and develop a character of their own over years of use. They are the traditional choice for heavy-haul and show truck operators who want the classic polished look. The tradeoffs are weight (stainless is significantly heavier than fiberglass), cost (a quality stainless set runs notably higher than fiberglass), and the fact that stainless does not accept paint, limiting your customization options.
ArmorCore fiberglass fenders — like our Peterbilt 389 sets — are lighter, paintable, and come in custom profiles not available in stainless. They are the choice for owner-operators who want a specific custom look, drivers who are conscious of payload weight, and truckers who want the option to match their fenders to a custom paint scheme. The lifetime warranty ensures that quality concerns are covered for the life of your ownership.
For most custom and show truck builds, fiberglass is the clear choice. For heavy-haul drivers who never paint their truck and want the traditional stainless aesthetic, steel remains a strong option. Our team can talk through both sides with you if you are undecided.
Ordering and Shipping
We ship to all 48 contiguous states with freight included in the price. Alaska and Hawaii orders are available — contact us for freight rates to those destinations. Most in-stock fender sets ship within 3 to 5 business days of order confirmation.
When your order ships, you will receive tracking information by email. Our team proactively communicates any delays or lead time changes — you will not be left wondering where your order is. For custom builds or out-of-stock items, we will confirm a production timeline before you finalize your order.
• All 48 contiguous states — freight included
• Ships in 3–5 business days for in-stock sets
• Email tracking notification on shipment
• Custom orders confirmed before payment
• Alaska and Hawaii available — contact for freight quote
Frequently Asked Questions
Will these fenders fit my Peterbilt 389 without modifying the brackets?
Our OEM-style replacement set uses the factory hole pattern and mounts directly to stock 389 brackets without modification in the vast majority of applications. Custom sidewall sets (short, medium, long) are pre-drilled and typically align to the same bracket positions, though trucks with non-standard setups may require minor adjustment. Call us with your specific configuration and we will confirm fitment before you order.
Can I paint these fenders to match my truck?
Yes. All fenders ship with a primer-ready UV-stabilized gel coat surface. Lightly sand with 220-grit sandpaper, apply a filler primer, and paint using any standard automotive paint system. The surface accepts lacquer, urethane, and waterborne paint systems without issue.
What does the lifetime warranty actually cover?
The lifetime warranty covers manufacturer defects in materials and construction for as long as you own the fender. It does not cover damage from accidents, collision, improper installation, or modifications. If you have a warranty claim, contact our team at info@badasscustomtruckparts.com with your order information and a description of the issue.
How long does shipping take?
Most in-stock sets ship within 3 to 5 business days. Freight transit typically adds 2 to 5 business days depending on your location. You will receive tracking information when your order ships, and our team is available to provide updates throughout the process.
Do you ship to Canada?
We currently ship to all 48 contiguous US states with freight included. For Canadian orders, please contact us at 812-523-2228 or info@badasscustomtruckparts.com for a custom freight quote and to confirm import requirements for your province.
Is the fiberglass pre-painted or raw?
Fenders ship in a primer-ready gel coat finish — not painted. This gives you the flexibility to paint them any color you choose, match an existing custom paint scheme, or have a shop apply your preferred finish before installation.
Ready to Upgrade Your Peterbilt 389 Front Fenders?
Browse the full collection above and select the sidewall size that fits your 389's configuration and style. If you have questions about fitment, sidewall options, or lead times, our team is available Monday through Friday, 8am to 5pm EST.
Call: 812-523-2228
Email: info@badasscustomtruckparts.com
Hours: Monday–Friday, 8:00 AM – 5:00 PM EST
Every Peterbilt 389 front fender set we ship carries our lifetime warranty and is built by a team that takes professional trucking seriously. When you put Bad Ass fenders on your 389, you are getting a product built by people who understand what your truck means to you — and what it needs to keep performing mile after mile.