diesel exhaust systems
A word from the DTF
Does a Banks Power system cause the exhaust to be Louder? Every Banks diesel exhaust system is
engineered to provide a civilized tone. In most cases, this will be moderately louder than stock, but with a rich throaty quality that is pleasing to the ear.
What grade of stainless steel does Banks use in its diesel exhaust systems, and why? There are two primary categories
of stainless steel tubing used in automotive exhaust systems: 300 series and 400 series. Banks commonly uses 400 series
stainless for exhaust and manifold applications primarily because it handles heat cycling better than the 300 series. 300
series stainless becomes brittle after constant heating and cooling (which is exactly what an exhaust system does)
especially in areas that incorporate welds. The issue of heat cycling is of great importance, especially in a heavy-duty
application that will endure greater levels of heat than other automotive applications. Not only is 300 series stainless a
poorer choice for exhaust systems, it is also more expensive and would unnecessarily increase the price of an exhaust
system. 400 series stainless is not as pretty as 300 series and will have a brownish hue to it, due to the fact that it has
a higher carbon content than 300 series. This means the 300 series stainless will polish up better for appearance. The
carbon content in 400 series also makes it magnetic, unlike 300 series, which is a simple test to determine which series
you're dealing with. Fortunately, 400 series will handle temperatures of up to 2000 degrees without any deterioration,
making it very suitable for use in exhaust systems. We use 400-series, specifically 409, for our entire exhaust systems,
except the polished tip which is polished 304.
Is emission information available for Banks Power diesel exhaust systems? All Banks truck and RV Power and Braking Systems product is emissions tested, and complies with California and federal emissions standards. Depending on the
Banks system that is installed, your vehicle may be covered under a California Air Resources Board Executive Orders (CARB E.O.).
These are issued after meeting the test criteria set forth by CARB for aftermarket product on over-the-road vehicles.
Although there are a few companies that follow this procedure for gasoline applications, there are far fewer companies
compliant in the diesel aftermarket.