Frequently Asked Questions About Peterbilt 359 Air Tanks, Wraps & Mounting
What size air tanks fit a Peterbilt 359, and how do I determine the correct mounting brackets?
Most Peterbilt 359 models accommodate standard 11" x 25" or 11" x 30" aluminum air tanks, though some owners prefer the larger 11" x 36" tanks for extended capacity. The mounting bracket spacing depends on your specific frame rails and year model. Pre-1987 359s typically have 34" frame rail spacing, while 1987 and newer models often have 34.5" spacing. Always measure your frame rails center-to-center before ordering brackets. Our universal mounting kits include adjustable brackets that fit most 359 configurations from 1967-1987.
Are stainless steel tank wraps worth the extra cost compared to chrome or polished aluminum?
Stainless steel wraps offer superior longevity, especially if you operate in regions with road salt or coastal areas. While chrome wraps cost 30-40% less initially, they require re-chroming every 3-5 years depending on exposure. Stainless steel maintains its finish with simple polishing and resists pitting and corrosion. For trucks in dry climates with minimal winter driving, polished aluminum wraps provide good value. Consider your operating environment and maintenance preferences when choosing.
Can I install air tanks and mounting brackets myself, or do I need professional help?
Installation is manageable for those with basic mechanical skills and proper tools. You'll need a drill with metal bits, wrenches, and ideally an air impact driver. The process typically takes 3-4 hours. Critical considerations include proper bracket alignment, secure mounting with grade 8 bolts, and correct air line routing with DOT-approved fittings. Many customers successfully complete installation using our detailed instructions. However, if you're uncomfortable working with air brake systems, professional installation ensures DOT compliance and safety.
Do aftermarket air tanks affect my truck's ride quality or braking performance?
When properly sized and installed, aftermarket tanks maintain or improve your braking system performance. Upgrading to larger capacity tanks (like 11" x 36") provides more air reserve for frequent brake applications, beneficial for mountain driving or heavy hauling. The key is maintaining your system's required minimum PSI rating (typically 120-150 PSI). All our replacement tanks meet or exceed OEM specifications and include proper baffling to prevent moisture accumulation. Some drivers report smoother brake engagement after upgrading from original steel tanks to modern aluminum units.
What's included in a complete air tank kit, and what additional parts might I need?
Our complete kits include the air tanks, mounting brackets, grade 8 mounting hardware, and basic installation instructions. However, you'll typically need to purchase separately: air line fittings (specific to your truck's configuration), drain valves, pressure protection valves if upgrading tank size, and potentially new air lines if yours show wear. Tank wraps are also sold separately to allow finish choice. Budget an additional $75-150 for fittings and valves when planning your installation. We recommend inspecting your existing air lines and valves during installation to identify any components needing replacement.
