With 100 percent stainless steel construction and straight through muffler design, the Racing Spec II exhaust system offers both lightweight construction and extreme exhaust high-flow efficiency. Torque at low RPM is enhanced by using spring hook type connectors along with an engineered intermediate silencer.Spring hook type connector for better exhaust flow while maintain torque power at lower speedLightweight all stainless steel constructionThe intermediate silencer (torque bulge) is designed with characteristics to ensure an effective torque curveIncluded stainless steel wool packed silencer Lightweight all stainless steel construction.