Stainless Single Exhaust FJ Crusier. Gibson's bolt-on design allows easy installation with professional looking results. Increase your throttle response and pulling power, while giving the vehicle a mellow tone that doesn't resonate in the cab. Each kit finishes off with a bold polished 4 inch stainless steel exhaust tip.Gibson Performance Exhaust introduces a powerful new cat-back exhaust system for the popular new 2007 Toyota FJ Cruiser 4.0L. Their bolt-on design allows easy installation with professional looking results. Increase your throttle response and pulling power, while giving the vehicle a mellow tone that doesn't resonate in the cab. Each 3 inch kit finishes off with a bold polished 4 inch stainless steel exhaust tip.