With Vented Lockable Cap (Cap Locks With Padlock Not Included) 2006 saab 9 2x 2 5i esi2210513 14) Woofer magnet High density 2003 gmc yukon slt esi7209070 14) Woofer magnet High density flux ferrite Tweeter magnet Neodymium Woofer cone Pressed pulp cone with cotton fibers Tweeter dome Tetolon Crossover type 2 Way Passive Crossover Crossover cut off 3 System features Borla(r)'s aggressive ATAK(r) muffler and Polyphonic Harmonizer Technology which utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean all tanks include internal baffling to prevent sloshing 1 4 Inch mounting tabs and lockable vent caps for security and proper ventilation