Banks Monster Exhaust System 4-inch Single Exit, Chrome TipIntroducing the Banks Monster Exhaust System, with chrome tip. 4 inch heavy duty stainless DPF back Monster Exhaust system with constant diameter intermediate pipe and tailpipe. Exclusive CoolCuff design lowers tailpipe temperatures as much or more than stock while simultaneously improving flow and cutting backpressure. Tested and refined by Banks engineers using Computational Fluid Dynamics software, then validated through extensive temperature