PART #16431 FEATURES: For Use With BBK Long Tube Headers Part Number 1643 and 16430 Increases Horsepower and Adds an Aggressive Exhaust Note 2-3/4" Mandrel Bent Stainless Steel Tubing High Flow Catalytic Converters for Maximum Flow For Use With BBK Long Tube Headers Cannot Be Sold or Shipped To California Residents VEHICLE FITMENT: 2005-2010 Mustang V6 4.0L Complete Your Long Tube Header Install Crank up the power potential of your 2005-2010 Mustang V6 4.0L with this BBK Performance catted short X-pipe. This BBK X-pipe will dramatically increase the sound of your Mustang to a roar that will be sure to turn heads. Not only is this X-pipe required to finish your long tube header install, it further improves exhaust flow, increasing horsepower, torque and throttle response. High Quality BBK short x-pipes are designed from 2-3/4" mandrel bent stainless steel tubing with high flow catalytic converters for maximum exhaust flow. The X-pipe features rear oxygen sensor bungs in the factory location making installation a breeze. Installation The X-pipe is designed to be used with BBK long tube headers. This X-pipe cannot be sold or shipped to any California resident or address. Additional Emissions Information This part is NOT C.A.R.B Approved and cannot be installed for use on any emission controlled vehicle in California. It cannot be sold or shipped to any California resident or addressee.