Test your Metal! What kind is it?

When consumers go to purchase a high performance, truck exhaust sytem, they are often faced with a dilemma - what kind of exhaust system should I get?

Or more specifically, what type of metal do I want my exhaust system to be manufactured from? Well, here's an easy-t0-understand primer I found in the July 2007 issue of "Truck & SUV Performance and Accessory Retailing." The author is listed as Martin Barkey, CEO, MBRP Inc.

So, here are the three primary material grades used in aftermarket exhaust sytems and their relative benifits/shortcomings. Enjoy.

Aluminized Steel: Not Stainless

Aluminized steel is a heavy-gauge steel that has been offered as a solution for the cost-conscious customer. It is not a stainless-steel materal grade.

Aluminized steel is the ideal option for customers who require a solution that offers the best performance at a low price-point. It is also an option for those who reside in a geographical area where weather is typically dry and mild. When used in more demanding applications and extreme weather, this materal will show signs of wear and rust more quickly than stainless steel. Aluminized stainless usually carries a one-year warranty, depending on the manufacturer.

T409 Stainless

T409 stainless, also known as ferritic stainless, is probably the best-known and most popular grade of stainless available. T409 is a low-carbon steel that is at least 12-percent chromium. it is a rugged, durable, long-lasting material grade offering a variety of finishes from dull "mill" finish to a high-shine finish.

In extreme applications and harsh weather conditions, it can eventually show signs of wear, such as surface rust, but the core of this material will remain solid. It offers a high-value, attractive material selection at a more affordable price. This material grade usually carries between a 5- to 10-year warranty, depending on the manufacturer.

T304 Stainless

T304 stainless, also known as austenitic stainless, is generally the highest material grade used for exhaust sytems. It is an aircraft-quality, 16-gauge stainless containing 18-20 percent chromium and 8-10 percent nickel.

The material is highly durable and it will never rust. It is very attractive and, even after extended use, can be polished to a high-shine finish. It also has the lightest weight of any of the material grades because of its high chromium content.

T304 stainless is the perfect choice for vehicles that will be owned for an extended period of time and/or need to stand up to rugged use or challenging weather conditions. It's also the only choice for the truck or SUV owner who simply wants to very best or is using their vehicle as a show vehicle. T304 aftermarket exhaust systems automatically add to the value of the vehicle, and the appearance is exceptional.

Because it is the finest material grade available, T304 also has a higher price point. This material grade frequently carries a lifetime warranty, depending on the manufacturer.

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And that's a wrap. So, how did you like your primer of exhaust system material grades? If you live in the northern United States (like me) and have to deal with lots of rain in the summer, and snow and ice(and salt) in the winter, then you definitely want to go with the T304. I mean, any other exhaust system will rust to pieces in a very short time.

At the other end of the spectrum, you fools down in Texas and Arizona are good to go with your standard Aluminized system. Dry, hot conditions are no problem for this metal and it holds up just fine for a long time.

out!