From the Texan company Sabertec comes the Blade, an exhaust pipe add-on that promises a lot. By providing an extra filter over the exhaust gases, the Blade removes additional CO2 and particulate matter coming out the back of your car.
Sabertec claims that if every car in America had a blade, CO2 emissions would be reduced by 180 billion pounds. In addition, the Blade is CARB-certified not to cause horsepower-robbing backpressure.