Kenworth W990 Mud Flaps

Frequently Asked Questions About Kenworth W990 Mud Flaps

Will these mud flaps fit my specific year model W990, and what about trucks with different wheel configurations?

Our Kenworth W990 mud flaps are designed to fit all W990 models from 2018 to present. However, fitment can vary based on your wheel configuration. Standard single rear wheel (SRW) setups typically use 24-inch wide mud flaps, while dual rear wheel (DRW) configurations often require 30-inch wide options. For trucks with custom suspensions or lift kits, you may need to adjust mounting brackets or choose longer mud flaps to ensure proper ground clearance of 6-8 inches.

What's the difference between rubber and stainless steel mud flaps, and which holds up better in harsh conditions?

Heavy-duty rubber mud flaps are the most popular choice for their flexibility and durability, typically lasting 3-5 years with regular use. They handle extreme temperatures well and won't crack in freezing conditions. Stainless steel mud flaps offer a premium appearance and can last 10+ years, but they're heavier and create more road noise. For winter driving or heavy-duty applications, anti-sail rubber flaps with internal steel weights provide the best balance of protection and longevity without the constant flapping at highway speeds.

Do I need special tools or drilling to install these, and how long does installation typically take?

Most W990 mud flaps install using existing mounting holes in your truck's frame, requiring no drilling. You'll need basic hand tools: a socket set (typically 13mm and 15mm), a torque wrench, and possibly a pry bar for tight spaces. Installation takes about 30-45 minutes per side for an experienced person. Some aftermarket brackets may require drilling 2-3 holes per side, which adds another 20-30 minutes to the job. We recommend using stainless steel hardware to prevent rust, especially if you operate in areas with road salt.

What size mud flaps do I need, and how do I ensure they won't drag or get damaged?

Standard W990 mud flaps come in 24" x 30" for most applications, but proper sizing depends on your tire size and suspension setup. Measure from your mounting point to the ground, then subtract 6-8 inches for ideal clearance. Mud flaps that are too long will drag and tear, while those too short won't provide adequate protection. For lowered trucks or those with air suspension, consider adjustable mounting brackets that allow you to fine-tune the height as your suspension travels.

Are there options that won't fade or lose their finish, and what about custom logos or designs?

UV-resistant rubber compounds and powder-coated steel options maintain their appearance longest, typically 5-7 years before noticeable fading. Plain black rubber is most fade-resistant, while colored options may show wear sooner. Many mud flaps accept custom logos or lettering through embossing or bolt-on plates. Stainless steel options can be polished to maintain their mirror finish, while textured rubber hides scratches and wear better than smooth finishes. For maximum longevity, apply a rubber protectant every 3-4 months.