Borla 21-22 Jeep Wrangler Rubicon 392 6.4L V8 AT 4WD 4DR S-Type Cat-Back Exhaust - Coated BlackBorla 21 22 Jeep Wrangler Rubicon 392 6. 4L V8 AT 4WD 4DR S Type Cat Back Exhaust Coated Black The BORLA(r) team has created a system especially for the 6. 4L Wrangler Rubicon 392. This Cat Back(tm) system contains BORLA(r)'S patented SwitchFire(tm) technology which eliminates the turbulent center intersection of a standard X Pipe. The SwitchFire(tm) design truly blends the combustion pulses from both sides of the engine for improved performance and a