These pipes are intended to add the NPP (dual-mode option) valves to Borla® systems 11920 and 11921 that did not come with NPP valves. They can only be used with mufflers that have dual tips exiting the mufflers. These pipes replace the outside tailpipe on each muffler. Outside tailpipe on 11920 or 11921 must be cut off of the Axle-Back assembly in order for these tailpipes to be installed. Clamps included. Wiring and actuators are not included. They are not intended to add NPP to a vehicle that was not originally equipped with NPP.

Only compatible with the following Borla exhausts:

11920
11921