Cab Cabin Sleeper Fairing Extenders Bottom Lower
- Compatible with Peterbilt 579 2013-2021
- Designed to precisely match the bottom lower sleeper fairing extenders for both the left (driver) and right (passenger) sides
- Heavy-Duty Build for Long-Term Use – Manufactured from aluminum, to withstand harsh road conditions and provide long-lasting protection and aerodynamic performance.
- Easy Installation – Direct bolt-on replacement with no modifications needed. Ideal for both professional mechanics and DIY truck owners.
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Comes with Logo, 2x 22" Windshield Wipers, and Reflective Vest
Please note in order to process the shipping promptly Buyer must provide a VALID phone number where they can be reached and contacted by the delivery carrier. Failure to do so may result in delayed shipment. Seller is not liable for any expense associated with failure to provide contact information on Buyers behalf. Seller reserves the right to hold the shipment until the contact with Buyer has been established to cleat all shipping details. Please make sure to provide your full and detailed shipping address information! Contact us if you want to pick up the item or if you want to know more about delivery options in Washington.
Keep your Peterbilt 579 looking sharp and aerodynamically efficient with this Cabin Lower Sleeper Fairing Extenders Set, designed to fit 2013 through 2021 model years. Whether you're a fleet manager maintaining a professional appearance across your trucks or a body shop handling a collision repair, these fairing extenders deliver the precise OEM-style fitment you need to get the job done right the first time.
This set includes both the left (driver side) and right (passenger side) lower sleeper fairing extenders, engineered to match the exact contour and dimensions of the original Peterbilt 579 lower cab fairing panels. Constructed from heavy-duty materials built to withstand the demands of long-haul trucking, these extenders resist cracking, warping, and road debris impact. The smooth, paint-ready finish means your body shop can prime and paint them to match any truck color with minimal prep work, saving valuable time in the bay.
Installation is straightforward and designed to align with the factory mounting points on the Peterbilt 579, making it a hassle-free replacement that does not require drilling or major modifications. Truck owners and professional installers alike will appreciate the clean fitment and solid construction that holds up mile after mile. These lower sleeper fairing extenders also help maintain the aerodynamic profile of your 579, which contributes to better fuel efficiency on the highway.
At Kozak Parts, we stock these Peterbilt 579 lower sleeper fairing extenders right here at our Seattle, WA warehouse, so you can count on fast shipping to get your truck back on the road without unnecessary downtime. Whether you're replacing storm-damaged panels or refreshing the look of a high-mileage rig, this set is a reliable, cost-effective solution for any 2013-2021 Peterbilt 579 owner or repair professional.









