Borla 40059 Boomers Spit Fire Oval Muffler Made of corrosion resistant aircraft quality stainless steel which decreases the fatigue incurred on these parts during high performance uses BORLA uses patented straight-through and multi-core technology to help increase horsepower and torque. Precision manufactured using aircraft-quality stainless steel, guaranteed to look like new for one million miles. Inlet Diameter: 3" Dual DTM Tip Case Size: 14"x8 1/2"x5 1/2"