Big Gun Exhaust is one of the biggest names in performance for ATVs and UTVs. In this article, we’ll help show you which model best fits your needs and riding style?

After tires, an exhaust system is the most common aftermarket accessory ATV and UTV owners tend to add to their machines. There are several reasons for this. They add horsepower, reduce weight and add a distinctive sound to the machine. One of the biggest names in the industry is Big Gun Exhaust. It offers different models of exhaust systems for just about every four-stroke machine and even has exhaust systems for popular utility machines. Which Big Gun ATV Exhaust is right for you? The company produces a host of options, including several versions of the popular Big Gun EVO exhaust. Below we look at each Big Gun ATV exhaust available.

Big Gun EVO U

Big Gun EVO U

The EVO U is a popular system from Big Gun Exhaust. The U obviously stands for Utility and this is the series of exhaust systems for your hard-working machines and Sport-Utility machines. These exhaust systems provide a small but noticeable power increase, a characteristic of most exhaust systems. There is also a definite change in the tone of your engine. Yes, it will be louder, even though Big Gun installs its Vortex Quiet Insert so it’s not too loud. The muffler is made from high-grade aluminum and coated in a high-temperature black finish. The exhaust pipe is 304 stainless steel with TIG-welded, reinforced muffler brackets. There is a USFS-approved spark arrestor screen, so you won’t start any fires and are legal on the trail.

Shop for the Big Gun EVO U

Big Gun EVO R

Big Gun EVO R

The EVO R represents the racing history and technology that made Big Gun one of the big guns in the performance scene. This Big Gun exhaust system is designed for making power and saving weight, all the things you expect in a competition exhaust. Big Gun boasts that the R series will provide massive increases in horsepower and torque. It can back it up by opening up the flow out of the engine. The muffler is anodized aluminum and is mated to a 304 stainless-steel header pipe. The muffler saves weight over the stock system and the reduced size allows for full clearance. These exhaust systems are available for modern sport machines and motocross bikes. There is a distinct sound increase, but if you’re in the market for performance, you’ll appreciate the tone. The Big Gun EVO R includes a removable USFS-approved spark arrestor screen that doesn’t hinder performance at all.

Shop for the Big Gun EVO R

Big Gun EVO M

Big Gun EVO M

The EVO M has been part of the lineup for over a decade and remains one of the more popular options. The M stands for mini, meaning this exhaust was designed to add performance increases to 50cc to 110cc youth ATVs, and who doesn’t want to let their kids rip around on a mean sounding machine? It does for the youth models the exact same things you get in the full-sized machines – reduced weight, increased power and a definite change in sound output. The muffler is aluminum and is mated to a 304 stainless steel pipe with TIG-welded hangers. The muffler has a USFS-approved spark arrestor screen, just like the other models and the system has the same sweet look at the other Big Gun Exhaust systems. You can make your kid’s machine look just like mom and dad’s. How cool is that?

Shop for the Big Gun EVO M

Big Gun ECO Exhaust

Big Gun ECO

The Big Gun ECO exhaust is for those looking to add performance and style while on a budget. The ECO series is a slip-on exhaust that mounts mid pipe and uses quality components. It has a 6061 aluminum muffler mated to a 304 stainless pipe. The end cap is black powder-coated stainless steel for a distinct look. The ECO system offers improved power and torque over stock and has the sporty sound of a Big Gun Exhaust. Each ECO exhaust has a removable USFS-approved spark arrestor screen. The ECO system is available for select recreation, sport and utility machines.

Shop for the Big Gun ECO

Big Gun EXO

Big Gun EXO

When you’re riding the big machine, you need the biggest Big Gun and that is the EXO series. These Big Gun exhaust systems were created for machines with bigger motors that needed a bigger muffler to optimize the horsepower and torque output while still providing a manageable sound output. The hexagonal-shaped aluminum mufflers have Big Gun’s internal sound wave altering technology that maximizes the performance without the excessive sound. The hexagon shape maximizes the volume of air the muffler can move, while maintaining a minimal size. There is a stainless steel coned inlet to allow for more volume moving through the muffler. The EXO system uses all of the same premium materials as the rest of the Big Gun line with a 304 stainless steel pipe and USFS-approved spark arrestor screen.

Shop for the Big Gun EXO

Big Gun EXO Stainless

Big Gun EXO Stainless

The EXO Stainless is what happens when performance meets durability. The Big Gun EXO Stainless takes all of the features and design of the EXO series Big Gun Exhaust and replaces all of the aluminum components with durable 304 stainless steel. Big Gun states that this system is its most durable exhaust. Made for the same big engine machines, the EXO stainless is a high performance system that looks great and is very distinctive.

Shop for the Big Gun EXO Stainless

How easy is it to add a Big Gun Exhaust to my machine?

Big Gun TFI Power Box

Swapping out the stock exhaust system on your ATV or UTV isn’t that difficult. Most are a simple bolt-on project that can be done relatively quickly in an hour or less, depending on the machine. However, to truly get the most advantage out of adding a Big Gun Exhaust to your machine, you need to tune the fuel system after installation and prior to use. A Big Gun TFI Powerbox is a simple tool that lets you program your machine’s EFI to work with the new exhaust. Doing this will add additional horsepower to your machine by optimizing the fuel delivery and exhaust timing. These are plug-and-play devices and are very simple to use., making the whole process pretty painless.

Shop for the Big Gun TFI Powerbox

How much power will I gain with a Big Gun Exhaust system?

How much of a boost you’ll see will depend on the model of Big Gun and the machine you have. Typically, with most exhaust systems, you’ll see a boost of 3-5 horsepower and 4-6 foot/pounds of torque. That is if you have a properly tuned EFI, too. These numbers vary according to your elevation, machine, fuel quality and more. You can see significantly more power, or you can see an average increase. You will, however, experience a boost that you will be able to feel when you’re on the gas.

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