Flowmaster Hush Power Resonator*** EXPECT UNIVERSAL INSTALLATION *** Clamp on or Weld on, Sized properly for RIPP exhaust system. The 409S HP 2 mufflers have a case length of 18 inches and a 4. 00 X 5. 50 inch width. Due to their Cool Shell Technology they can be placed in virtually any location under the vehicle. The 409S HP 2 mufflers feature a painted 409S outer shell, and 409S internal construction. 2. 50 inch inlet outlet diameters, there is a model available to suit your