BANKS 19249 RAM-AIR DIFFERENTIAL COVER KIT-REAR 2001-2019 GM 2500HD/3500HD 2003-2018 DODGE RAM 2500/3500

The All-New Patented Banks Ram-Air Differential Cover Wipes out the competition! When it comes to product development, we only make products that increase performance and beat the competition.

So, when we tested the popular Diff Covers on the market, we were shocked to find out that they actually hurt performance. This led to the development of something so New and Incredible that our performance design has a United States Patent. Look, when we set out to build a product for your vehicle, we only engineer the best. What else would you expect from a company with a winning legacy that spans decades.

We are here to win, and we just did (Again) in a huge way.

Purpose Built
The Banks Engineering team's goal was to perfect fluid flow and reject BTUs from the fluid as fast as the ring and pinion puts them in. If the fluid flow is impeded in any way, it results in resistance and aeration which reduce fuel economy and creates heat, thereby degrading the fluid and decreasing the lifespan of the gearset.
Outperform the Competition, for less.
Thanks to its superior fluid and aerodynamics, the Ram-Air Cover out-performs stock and flat-back high-capacity covers and does so with less lubricant. Increased distance between service intervals and less lubricant means you'll save money while extending gear life.
Key Highlights

• New patented design features Ram-Air scoops for fastest cooling
• Provides cold high velocity air, overcoming dead air zone behind differential.
• Scoops force air up and into massive heat radiation fins
• Engineered to break-away if snagged on an obstacle.
• Banks cools 5X better than flat-back covers in on-road towing tests over the same road, same weather, operator and vehicle.
• Cools 118 percent better than flat backs in 200hp 60mph sustained tests.
• Dry-mount high-pressure silicone O-ring seal. No messy RTV clean!
• Internal fins transfer heat through the cover into the external fins
• Clears spare tire heat shield, Panhard bars and other components.
• Does not sacrifice any ground clearance.
• Limited Lifetime Warranty
• Fluid Dynamics
• Axle tube lubricant guides directs lube to bearings w/o overfilling.
• Cover mates flush with differential housing for smooth fluid flow.
• Ring gear raceway controls fluid flow to the pinion and bearings.
• Low fluid aeration means longer fluid life.

Technical Specs

• Weight: 11.7 lbs.
• External heat radiation fin count: 24
• Internal heat absorption fin count: 26
• Dimensions: 14.2-inch X 13.3-inch X 3.8 inch
• External heat radiation fin surface area: 533.782 in2
• Internal heat absorption fin surface area: 119.882 in2
• External heat radiation total surface area: 808.81 in2
• Internal heat absorption total surface area: 215.78 in2
• Fasteners: 14 x stainless steel M8-1.25 flange hex bolts
• Material: A380 aluminum diecast with CNC machined surfaces
• Internal Volume: About 4.0 quarts 
• Oil service.
• Magnetic drain plug
• Magnetic fill port plug
• 20-degree angled fill port for easy access
• No need to remove cover to change fluid.
• 1/2-inch sight glass with contrast screen (visual aid) and Viton seal
• Banks recommends Amsoil 75W-90 Severe Gear Synthetic Gear Lube
• Fill level depends on model year: (About 4.0 quarts Fill to OEM Level)
• Emissions Compliant: E.O. Not Required

US Patent 10,443,705 B1