Diesel particulate filter, filters the particulate matter by forcing the exhaust gases to secure a ceramic wall flow filter. The ceramic wall flow filter has a porous wall and is single ended. When the spent gases are forcibly passed through the porous wall, the particulate matter is filtered as well as the gas is let loose thereby reducing the particulate emission in the atmosphere. I've a weight problem my life. My parents bought me "huskies" while I would definitely grammar school. I wasn't an extremely active kid. My parents always provided 3 good meals to me daily. School lunches were actually nutritious in those days. They weren't anything like now with pizza, tacos, hamburgers, hotdogs, chips, sweet sodas and all sorts of types of chips and desserts. I hear french fries include the main course especially with school girls. Today's kids don't have a chance.