Engineered to cool motor oil

The Banks CoolRunner Oil Pan for the 2017-2019 Duramax out-performs and out-cools the competition by leveraging decades of racing and military engine development.

•19 deep-cut huge external radiator fins provide more surface area to the cool air moving under the truck.

•Die-cast process provides a smoother interior surface which improves oil flow to the pickup tube and drain.

•Smooth, streamlined area around the oil pickup with an anti-cavitation dimple improves oil flow to the pump by reducing restriction at the filter inlet.

•15 internal fins absorb more heat from the oil than a stock or any other aftermarket pan.

Banks proprietary FlowThru Fins™ maximize thermal energy transfer by lining up the internal and external features with each other.

Engine heat is efficiently drawn from the sump where the hottest oil rests. Cooler oil retains the proper viscosity, which means metal-on-metal surfaces remain properly lubricated.

With more internal heat absorption surface area and more external heat radiation surface area, your motor oil stays within its optimum operating temperature, which prevents oxidation or breakdown even when hauling up a grade.

Engineered to run cool

The Banks Ram-Air Transmission Pan for 2001-2019 Duramax trucks with Allison 1000 transmission outperforms and out cools the competition by leveraging decades of Ram-Air technology and thermal management expertise honed in racing and military engine development.

Taking advantage of the fast-moving cool air under your truck, the Ram-Air Transmission Pans' Patent Pending design draws ambient air through the large forward-facing scoop, funneling it through the external heat radiation fins.

The plastic scoop is also designed to break away without causing damage to your pan, just in case. If this happens to you, let us know and we will send a replacement Ram-Air scoop on the house.

•1/8" NPT port for easily adding a supplemental temperature sensor.

•24 deep-cut external radiator fins provide more exposed surface area to the cool air moving under the truck.

•Integrated support structure for internal filter acts as anti-slosh baffles for fluid in the pan.

•18 internal fins absorb more heat from the oil than a standard or all aftermarket pans.

•Die-cast process provides a smoother, less porous interior surface and improves fluid flow in the pan.

The Banks proprietary FlowThru Fins™ maximize thermal energy transfer by lining up the internal absorption and external radiator elements with each other.

Transmission fluid heat is efficiently drawn from the fluid, reducing stress on your Duramax's cooling and lubrication systems.

Banks vs Stock

The stock Duramax pan is made from stamped steel which has no internal or external fins to assist in removing heat from the fluid inside.

Without additional means to cool the fluid, it quickly becomes heat soaked with no way to radiate the additional heat load.

Banks vs The Competition

What happens when the Ram-Air goes against the competition? While others claim to have massive cooling ability with their designs featuring fins that cross haphazardly across their surface with no consideration for fluid dynamics, the Banks Ram-Air still comes out on top in total internal and external fin area.

What all others lack though, is the forward facing Ram-Air scoop to help guide the air under your truck directly through its die-cast FlowThru Fins^TM which further enhances heat transfer out of your fluid and away from your transmission. No other pan is as well engineered.

Die-Cast vs Sand-cast

All Banks lubrication cooling products are die-cast, not sand-cast like competitors. Made with far greater precision, a die-cast part is denser, smoother, and has virtually no porosity compared to the equivalent sand-cast part.

Sand-cast parts can even retain the sand they were molded with. (You don’t want sand in your oil). Finally, our long, thin cooling fins are only possible with a die-cast process. Although this process costs more, we think it's worth it.

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 gear set.

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.