The exhaust manifold is made of high quality 409 stainless steel sturdy construction guaranteed. It is rust-resistant and sturdily designed greatly limiting the potential for gas leaks. This exhaust manifold is easy to install and fits into 91-99 Jeep Cherokees perfectly. Our exhaust header can be connected to the tail tube to increase the air flow. Combined with author standard auto components gas leakage is minimized to protect the environment. If you are looking for a such product don't hesitate to buy it! --Smooth interior of the exhaust manifold --Runs quiet for comfortable driving experience --High-quality hardware --Sturdy 409 stainless steel frame for long time use --Increases air flow --Offers optimal flow characteristics for engines at high speeds --Perfect for installation in 91-99 Jeep Cherokees --Simple assembly for quick installation