The real restriction is not just the intake elbow itself. On the 6.7L Cummins, the stock #1 fuel line sits right where the outlet wants to be, so the elbow has to neck down, notch around it, or make an awkward turn. That hurts airflow before the air even gets to the manifold. We built the Banks Monster-Ram Intake and Killer Grid Heater Upgrade with our own fuel-line solution so the outlet could stay clean and symmetrical instead of compromised to clear the stock line. That is how you open the intake tract instead of just reshaping the same restriction. The result is better engine breathing, and in this test the Monster-Ram delivered an 88.3% increase in mass airflow over stock.
The video segment explains that the evaluation was not limited to the Monster-Ram alone. Banks compared it against the stock intake setup and other aftermarket options available on the market, including at least one unit sourced from eBay. The point of the comparison was to look at the full range of available designs rather than presenting the Monster-Ram in isolation.
The stock setup is described as having a very small outlet. In fluid-dynamics terms, that creates an immediate restriction and limits how cleanly air can move through the system. The factory design also has to accommodate a nearby fuel line, which forces the outlet path into an abrupt turn instead of allowing a smoother, more direct transition.
A central engineering issue throughout the comparison is the location of the fuel line. Because that line occupies space near the outlet, intake designers have to shape the casting around it. That packaging constraint drives much of the geometry seen in both the stock and aftermarket parts, and it explains why several designs end up with compromised outlet shapes rather than a balanced, unobstructed passage.
One aftermarket unit shown in the segment rises relatively flat through the outlet area. That means the airflow runs into a flat surface instead of moving through a more gradual, symmetrical path. According to the explanation in the video, this effectively restricts flow through the heater because the design has been flattened to clear the fuel line. Another competing design uses a large notch cut out of the outlet section for the same reason. Its shape is described as a similar up-flat-down arrangement, again reflecting the compromise imposed by the fuel-line clearance requirement.
The design objective for the Banks piece was to avoid those internal obstructions and asymmetrical transitions. Rather than accepting the distorted outlet geometry seen in other parts, the team wanted a cleaner flow path. The speaker makes it clear that the fuel line was the main obstacle preventing that goal, so the solution had to address the packaging issue directly instead of merely reshaping the outlet around it.
Banks' answer was to make its own fuel line arrangement. By redesigning that component, the fuel line could be routed so that it cleared the outlet section rather than intruding into it. That freed the intake design from the notch and flattened surfaces required by competing products and allowed the outlet to be formed as a smooth, symmetrical passage.
With the fuel-line interference removed, the Monster-Ram could use the outlet shape the designers actually wanted. The recap emphasizes that this was the key difference between the Banks design and the other products tested: instead of building around the obstruction, Banks eliminated the obstruction's effect on the outlet geometry. The segment closes by noting that the Monster-Ram is available from Banks, while the specific example shown on screen belonged to the presenter.
