NPP in A Box will turn any C6 into a Bi-mode exhaust equipped car, you provide the mufflers, we provide the rest.

If you already have NPP (bi-mode) mufflers from the factory, just purchase Mild2Wild

Just install the NPP mufflers from GM add NPP IN A BOX and you will have a fully functional NPP system that will use my Mild2Wild (included). All the parts needed are provided to allow you to tap engine vacuum to operate you mufflers (just like the OEM system). No special tools needed and average install is 30min, very simple.

What makes NPP in a BOX your only choice

**Very Low Operating Current = (less than 1/2 amp) generally systems like this take a few amps so NPP in a box will never / compromise your $80K car

**Ease Of Installation = A 15 minute simple install, 8-page color picture instructions

**Quality Of Components = Not only have I been working with the leaders in vacuum control, Each component (enclosure, components, wire, and connectors) are the best you can use.

**All Parts Are Included except the Mufflers (see below) = All tubing, fittings, controllers are included.

GM Muffler parts numbers

2009 and up need

10354706

10354705

2008 and below need

15879288

15879289

We now have the E-Z Tap for both LS2 and LS3 motors. This provides a much easier way to tap the vacuum. 5 min and you are done as compared with trying to access the back of the intake (almost imposable) and saves hours of frustration