Frequently Asked Questions About International 9900/i/ix Air Tanks, Wraps & Mounts

What are the exact model years and compatibility for these air tanks and mounting brackets?

These air tanks and mounting systems are designed specifically for International 9900, 9900i, and 9900ix models from 1987 through 2017. The 9900i (introduced in 2000) and 9900ix (introduced in 2004) share the same frame rail spacing and mounting points as the original 9900. However, always verify your specific truck's frame width and existing bracket configuration before ordering, as some custom-spec trucks may have variations.

What's the difference between aluminum and steel air tanks, and which should I choose?

Aluminum tanks are approximately 60% lighter than steel tanks, resist corrosion better, and won't rust from moisture accumulation. Steel tanks are more budget-friendly and highly durable against impact damage. For most over-the-road applications, aluminum tanks are preferred due to weight savings and longevity. Steel tanks work well for vocational trucks or situations where initial cost is the primary concern. Both meet DOT requirements when properly maintained.

How difficult is the installation process, and what tools are required?

Installation typically takes 2-4 hours per tank with basic mechanical skills. You'll need a socket set (typically 3/4" and 7/8"), torque wrench, jack stands or lift access, and potentially a drill if new mounting holes are required. Most direct-fit brackets bolt to existing frame holes. The main challenges include safely supporting the tank weight during installation and ensuring proper air line routing. Professional installation is recommended if you're uncomfortable working with air brake systems.

What sizes are available, and how do I determine what size air tank I need?

Common sizes range from 11" to 13.5" diameter with lengths from 24" to 36". Your required size depends on your air system demands and available frame space. Stock replacement typically uses the same size as OEM. For upgrades, measure your available mounting space and consider your air usage - larger tanks provide more reserve capacity for air horns, suspension, and frequent brake applications. Most 9900 series trucks use dual 11" x 30" or 13.5" x 30" configurations.

Are tank wraps necessary, and what finish options provide the best durability?

Tank wraps aren't required but offer significant benefits: they hide minor tank imperfections, provide additional protection against road debris, and enhance appearance. Polished stainless steel wraps offer the best long-term durability and maintain their shine with minimal maintenance. Chrome-plated wraps look excellent initially but may show wear in harsh conditions. Diamond plate and brushed finishes hide scratches well. For maximum protection and appearance, combine quality wraps with proper mounting straps that include rubber isolators.