Monster Duramax exhaust from Gale Banks Engineering
This 4″ heavy-duty stainless DPF-back Monster Exhaust system comes with constant-diameter intermediate pipe, Y-pipe and 3½” tailpipes for effortless fit. Exclusive CoolCuff® design lowers tailpipe temperatures as much or more than stock while dramatically increasing flow and cutting backpressure.
The CoolCuff design is tested and refined by Banks engineers using Computational Fluid Dynamics software, then validated through extensive temperature testing in all areas: before and after the DPF, 6″ out from the tip, by the spare tire, shocks, wiring, hoses, and more.
First we tested our own exhaust then we tested the others. Result: Monster Exhaust measured well over a hundred degrees cooler than the competition, and cooler than stock, too!
The system safely clears the spare tire, shocks and brake lines, and includes two huge 6X5″ polished-stainless rolled-edge tailpipe tips. Lifetime Warranty.