NPP exhaust on 2010 2SS

[Rich2010]

Originally Posted by dgoode2359

They’d need a constant vacuum source correct? Say if I ran a vacuum line to the intake manifold the vacuum would make the valves actuate based on the amount of vacuum its building depending on engine RPM. How could I wire them closed?

I’ve used a zip tie to hold the valves closed on mine when going for an inspection, super easy. You’ll see if you lay down and look at the flaps.

[JD555]

You can disconnect the vacuum actuators and wire them open or closed like Rich above