Red and loud! Flowtech Red Hot mufflers are the best value on the market today. Red Hot glass packs deliver a rich and powerful sound with minimal back pressure to increase the performance of any vehicle. Each glass pack is constructed of a large 3.5†dia 16 gauge case for added durability. Internally, Red Hots use a power louver straight through core design to reduce exhaust turbulence and improve exhaust flow. FlowTech wraps the power core with a high heat Cerama-glass packing for improved sound control and internal durability against burnout. Red Hot glass packs measure 24†end to end with the actual glass pack measuring 18†in length. Installation is a snap with the slip fit design.