4" heavy-duty stainless DPF-back Monster Exhaust system with constant-diameter intermediate pipe and tailpipe. Banks' exclusive Cool Cuff design significantly lowers tailpipe temperatures while improving flow and cutting backpressure. No competitive exhaust system cools tailpipe temps to safer levels than Monster Exhaust! The system includes a huge 6X5" polished-stainless rolled-edge tailpipe tip, and comes with a Lifetime Warranty.