PowerMax systems are designed for increasing the power of your car effectively. Since our systems are tested on racing cars, they guarantee significant power gain to your vehicle. Systems are constructed by T304 grade stainless steel throughout and highly polished. Full mandrel bend in all pipe works to ensure better air flow; Big diameter pipe all the way through to reduce back pressure; Deep sporty tune . All of our PowerMax systems carry a ten years warranty against rust and errosion, limited life time warranty for manufacturer craftsmanship. 2.1/4" twing X-pipe design highly polished finish