Banks Ram-Air® Differential Cover Kit - GM Duramax 6.6L (2020-2026) / RAM 6.7L Cummins (2019-2026) - AAM 11.5"/12" 14-Bolt Rear Axle

A die-cast aluminum Ram-Air® rear differential cover kit for the AAM 11.5" and 12" 14-bolt rear axle, fitting GM Duramax 6.6L (2020-2026) and RAM 6.7L Cummins (2019-2026). Patented Ram-Air scoops direct high-velocity air through the radiator fins to reject heat, with a sight glass, magnetic drain plug, and 20-degree fill port for cleaner service.

Key features

• A380 aircraft-grade die-cast aluminum with CNC-machined sealing surface
• Patented Ram-Air scoops direct cool, high-velocity air through the radiator fins
• 25 external radiator fins, 677.64 in² of external fin surface area for heat rejection
• 22 internal heat-absorption fins to transfer heat to the external fins without disrupting flow
• Sight glass with contrast screen and Viton O-ring seal
• Recessed magnetic drain plug and 20-degree fill plug simplify fluid changes
• Dry-mount silicone high-pressure O-ring seal, no RTV required
• 1/8" NPT port for differential temperature monitoring
• 304 stainless steel flanged mounting hardware

Technical specs

• Weight: 13.72 lb
• External radiation fins: 25; internal absorption fins: 22
• Dimensions: 14.09 in x 13.74 in x 4.16 in
• External fin surface area: 677.64 in²; internal fin surface area: 117.26 in²
• Internal volume: about 4.4 qt (verify against OEM owner's manual)
• Fasteners: 14 x stainless steel M8-1.25 flange hex bolts
• Material: A380 aluminum die-cast with CNC-machined surfaces
• Banks recommends Amsoil 75W-90 Severe Gear synthetic gear lube

Fitment

Fits the AAM 11.5" or 12" 14-bolt rear axle: Chevrolet Silverado 2500/3500 and GMC Sierra 2500/3500 HD with the 6.6L engine (2020-2026), and Ram 2500/3500 with the 6.7L Cummins (2019-2026). Also fits Ram 2500/3500 6.4L gas (2025-2026). CARB E.O. not required.

Installation

Installation manual and video from Banks

Banks part 19288 (Black Ops) / 19286 (Satin Black/Machined) / 19287 (Natural Aluminum). Shipping weight about 13.72 lb.