Flowmaster 524554 Super 50 Muffler - 2.25 Dual IN / 2.25 Dual OUT - Moderate Sound Reviewhttp://tinyurl.com/pkub6oz Flowmaster 524554 Super 50 Muffler - 2.25 Dual IN / 2.25 Dual OUT - Moderate Sound Mild to moderate exterior exhaust toneReduced Interior resonanceExcellent choice for large displacement vehiclesImproved horsepower or torque and potential mileage improvementRace proven patented delta flow technology