Making this modification is a pretty big deal. It can cost quite a bit of money, so you’re going to want to know what you have to gain from making this upgrade. There are three major reasons you would want to do this.
- Increases lifespan of the exhaust
There are plenty of other reasons to make this upgrade but these really are the heart of the decision. If you’re still not convinced let’s crack open each one of these factors to explore the benefit of each.
Sound: Sound is the first thing you will notice when you make this upgrade. Factory pipes are a tad bit on the restrictive side and the muffler is lacking in aggressiveness. A cat back exhaust will upgrade you to better flowing pipes and a muffler combination to get you that low rumble you’ve been looking for.
Performance Gains: You stand to make some performance gains as well. The high rate of flow doesn’t just improve the sound note. Engines are essentially air pumps; to make power they need to move a certain amount of air. It’s just as important to move the expelled fuel combination from the combustion chambers as it is to get it in there. Simply speaking, the better your engine can breathe, the more power it can make. Cat-back exhausts will help make that happen.
Materials: The materials used in these can be a major benefit. Odds are you’ll be exposing your 4x4 Sierra to snow fairly often (assuming you’re in the northern/northeastern parts of the county). If you’ve lived in the rust belt long enough or any area where road salt is used, you know how quickly vehicles tend to rot. The first thing to go most times is the exhaust.
Most cat-back exhausts are available in different materials. Stainless steel being one of them. Stainless steel will hold up longer in road salt than the factory exhaust will, and if you don’t want to fix your exhaust every couple of years this upgrade has your name all over it.
Aluminized steel is another popular material used on these exhaust kits. It’s treated to prevent corrosion, but won’t hold up as long as stainless will. This has no effect on the sound or the flow rate. It does typically cost less. This makes it perfect for you guys working on a budget. It also works perfectly for our friends to the south who don’t regularly see the horrors of road salt.