This flex pipe (bellows) is a reliable, high-quality option for your automotive exhaust system. Made from durable 304 stainless steel, this 4"L, 2.5" dia. flex pipe is designed to withstand even the toughest conditions. The bellow style ensures flexibility and reduces stress on the exhaust system, while the ultra sonic cleaning results in clean, seamless welds. Upgrade your exhaust system with this reliable and durable flex pipe.