When building an exhaust system, it is important to purchase parts that give good damping effects and flow characteristics in order to obtain the best performance from the engine. All stainless steel parts are manufactured from T304 grade stainless. When assembling a D.I.Y. system, the following should be taken in to account:
4 cylinder engines for street use - 2-3 silencer boxes.4 cylinder engines for competition use - 1-2 silencer boxes.6 cylinder engines for street use - 3-4 silencer boxes.6 cylinder engines for competition use - 2-3 silencer boxes.
For engines with power output of 150BHP or more, it is advisable to construct an exhaust from at least 2 1/2" diameter parts.
