Our Off-Road section is for products that are intended for off-road or competition use only. These products are not legal for use in California, or any "pollution-controlled" motor vehicle. You can expect additional gains in horsepower as well as many other benefits that your emissions equipment won't allow, but installation of these products will make your truck an "Off-Road" vehicle that may not be legal to drive on federal highways. It is your responsibility to check with your local state laws and decide if these products are right for you.