Banks Power AAM 11.5" 14-Bolt Ram-Air Differential Cover

Banks started from scratch while sparing no expense in the creation of the Banks Power AAM 11.5" 14-Bolt Ram-Air Differential Cover. Banks set out in search of the answer to the air-old "Do rear differential covers provide any real benefit or are they just bling?" After many, many hours of research, Gale and the Banks Engineering Team uncovered two underlying problems with the aftermarket diff covers on the market: poor air flow as well as flawed fluid dynamics. Both issues are not a concern with the Banks Ram-Air Diff Cover. 

After performing tests on covers with a flat-back design and larger fluid capacities, Banks found that the hard angle of the flat-back causes poor fluid dynamics. With computer-aided designing and road-testing, the Banks Ram-Air differential cover has improved fluid dynamics to help increase fuel economy and extend lubrication life. It also cools 118% better than its flat-back competitor at sustained 60mph dyno tests and 4x better in on-road towing tests! 

The Banks Ram-Air Differential Cover is constructed from A380 aluminum diecast featuring internal and external cooling fins, patented Ram-Air scoops to flow air around the cooling fins, dry-mount silicone O-ring seal, and includes chrome-plated mounting hardware. There's also no need to remove the cover to service the oil. Banks includes a magnetic drain plug, and a magnetic fill plug which is at a 20 degree angle for easier filling. A 1/2" stainless steel sight glass gives you the ability to monitor your fluid level and condition. 

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: 13.72 lbs
• External heat radiation fin count: 25
• Internal heat absorption fin count: 22
• Dimensions: 14.09 in X 13.74 in X 4.16 in
• External heat radiation fin surface area: 677.64 in2
• Internal heat absorption fin surface area: 117.26 in2
• External heat radiation total surface area: 897.94 in2
• Internal heat absorption total surface area: 229.70 in2
• Fasteners: 14 x stainless steel M8-1.25 flange hex bolts
• Material: A380 aluminum diecast with CNC machined surfaces
• Internal Volume: About 4.4 Qts (Check OEM Owners Manual)

Oil service

• Magnetic drain plug
• Fill port plug
• 20° fill port for easy access
• No need to remove cover to change fluid
• 1/2 in 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 4.4Qts Fill To OEM Level)