Frequently Asked Questions About International DuraStar Cab, Sleeper & Cowl Panels

What years and models of International DuraStar trucks do these panels fit?

Our cab, sleeper, and cowl panels are designed to fit International DuraStar trucks from 2002 to present. This includes the 4200, 4300, and 4400 series models. However, there are variations between model years, particularly with the 2007-2018 models having different mounting points than 2019+ models. We recommend checking your VIN or contacting our team with your specific truck details to ensure proper fitment before ordering.

Are these panels made from the same material as OEM parts, and how do they hold up against rust?

Most of our replacement panels are manufactured from 16-18 gauge steel, matching or exceeding OEM specifications. They come with an e-coat primer finish that provides excellent rust protection. For maximum longevity, we recommend applying additional rustproofing to cut edges and mounting points during installation. Some customers in high-salt areas report best results when adding a secondary rust prevention coating before final paint.

How difficult is the installation process, and what tools will I need?

Installation difficulty varies by panel type. Cowl panels typically require 2-4 hours and basic hand tools plus a drill. Cab corners and rocker panels are more involved, requiring cutting tools, welding equipment, and 4-8 hours of labor. Sleeper panels often need professional installation due to alignment requirements. Essential tools include a cut-off wheel, spot weld cutter, MIG welder, and standard body shop equipment. Many customers recommend having a second person assist with larger panels.

Do these panels come pre-painted or primed, and what prep work is needed?

All panels ship with a black e-coat primer finish only - they are not painted to match your truck color. The primer provides a good base for painting but requires proper preparation including light sanding with 320-400 grit sandpaper, cleaning with a degreasing agent, and applying a quality automotive primer-sealer before your color coat. Professional paint shops typically charge $200-400 per panel for prep and paint work.

What's the difference between aftermarket and OEM panels in terms of fit and quality?

Our aftermarket panels are precision-stamped to match OEM specifications and typically fit within 1/8 inch of factory panels. The main differences are price (aftermarket costs 40-60% less) and minor details like drain hole placement or brace positioning. Some installers report needing minor adjustments during fitment, but overall quality and durability match OEM when properly installed. We offer both economy and premium grade options, with premium panels featuring heavier gauge steel and tighter manufacturing tolerances.