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NPP Exhaust system

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Old May 29, 2020 | 08:10 PM
  #21  
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Originally Posted by old motorhead
Yeah, I'd be willing to do that. It's been running on manifold vacuum without any controller for over a year now. Don't think I'll ever use that controller. Also have a set of Z06 cans without the over the axle pipes. The tips are buggered up on the bottom side. Can't see it unless you're under the car. Hell, the first thing I did when I received my really nice ZR1 mufflers is etch the chrome tips, add a coat of high temp primer, and a coat of high temp flat black. Looks good and I never have to clean and polish them. I like to drive my Vette, not rub on it. Don't want to fool with shipping on the mufflers. I'm located west of Houston. $100 takes them. I want 85% of new price for the controller. PM if interested.
That's a good deal for the NPP in a Box and an absolutely smokin' deal for the Z06 mufflers.
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Old May 29, 2020 | 08:15 PM
  #22  
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Originally Posted by HOXXOH
That's a good deal for the NPP in a Box and an absolutely smokin' deal for the Z06 mufflers.
Since you can't buy the actuators/vacuum pots from GM, just those alone are probably worth a hundred bucks. I have a spare set of pots or I wouldn't be selling these.
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Old May 29, 2020 | 08:27 PM
  #23  
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Originally Posted by 2012CGS
Is the controller you are referring to the one behind the rear taillight?
Any chance you could post a photo?
My NPP stopped working and I assume that my controller has burned out.
Any idea how to best confirm the problem is the controller?
IIRC, it's only a vacuum accumulator behind the taillight. The control is in the BCM.
Assuming your fuse is good and "stopped working" means it won't go quiet, first check for vacuum at the muffler hoses, before pulling the taillight to check for vacuum at the incoming and exit hoses, then work your way forward to the hose connection at the back of the intake manifold.
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Old May 29, 2020 | 11:04 PM
  #24  
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Our you can just make your own... Nobody makes a Bi-mode for the center out rear diffuser... so I'm making my own... I could have done this less complected however this was my first go at it and wanted it to have an aggressive sound at WOT yet super quite when cruising the highway.... I drive my vette way to much, the loud pipes I had on it for the past 8 years just had to go....







One pie cut at a time... it’s all lot more work than it looks...

Not going to lie, its a lot of work... but I think it will be worth it in the end. I really hope to have it fired up this weekend.

SPEED SAFE, NICK
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Old Jun 1, 2020 | 07:20 PM
  #25  
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I can confirm, the '08 mufflers fit on my '05 just fine. It sounds awesome! Thanks for all the help.
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