[Lithias]

Just so everyone is aware, there is no difference part number wise between the NPP exhaust for a 2019 versus a 2018 SS. The difference is in the tune of when the ECU opens and closes the actuator and the engine timing/firing itself. The pops/crackle are a fuel combustion outside the cylinders in the exhaust. In fact, even in silent mode you can hear them being muffled. Still there, but muffled.

So unless you go to a quieter exhaust, you will not lose the pops nor will they be less frequent. Just louder.

This is research done because I am having my NPP exhaust warranty replaced and I was scared of losing the pops.

[madscotsman]

Originally Posted by Riverside2SS

I have the Borla Atak NPP axle back and it is sweet,sweet,sweet music!! Crackles and pops just as much as stock, but louder! I have my valves set to open all the time. This system comes with valves, but yes it is pricey at 1700.00....worth every penny IMO...Phastek is where I ordered it from. Good luck!

I have this as well. I can say my stock NPP didnt seem to have alot of pops and crackles unless the car was cold and the outside temp was cooler. I still don't hear alot of pops and crackles with the Borla either. Maybe I was spoiled by my Roush Mustang I traded in on the 1LE. The exhaust on that thing was rediculously loud and gave off a ton of pops and crackles any time you let off the accelerator.

[greg0ry]

Originally Posted by Lithias

Just so everyone is aware, there is no difference part number wise between the NPP exhaust for a 2019 versus a 2018 SS. The difference is in the tune of when the ECU opens and closes the actuator and the engine timing/firing itself. The pops/crackle are a fuel combustion outside the cylinders in the exhaust. In fact, even in silent mode you can hear them being muffled. Still there, but muffled.

So unless you go to a quieter exhaust, you will not lose the pops nor will they be less frequent. Just louder.

This is research done because I am having my NPP exhaust warranty replaced and I was scared of losing the pops.

Awesome man, thank you so much for the info. What happened w/ your NPP exhaust, why are you having to deal with the warranty? 2019?

[greg0ry]

Originally Posted by Riverside2SS

I have the Borla Atak NPP axle back and it is sweet,sweet,sweet music!! Crackles and pops just as much as stock, but louder! I have my valves set to open all the time. This system comes with valves, but yes it is pricey at 1700.00....worth every penny IMO...Phastek is where I ordered it from. Good luck!

I should probably be using my money on more important things right now but DAMN it sounds good. I found a place where I can get it for about 1300 flat no tax or shipping! driving me crazy lol

[Riverside2SS]

Originally Posted by greg0ry

I should probably be using my money on more important things right now but DAMN it sounds good. I found a place where I can get it for about 1300 flat no tax or shipping! driving me crazy lol

You should go for it at that price....but, make sure it has the valves. That sounds pretty low for price, so it may not.

[Riverside2SS]

Originally Posted by Lithias

Just so everyone is aware, there is no difference part number wise between the NPP exhaust for a 2019 versus a 2018 SS. The difference is in the tune of when the ECU opens and closes the actuator and the engine timing/firing itself. The pops/crackle are a fuel combustion outside the cylinders in the exhaust. In fact, even in silent mode you can hear them being muffled. Still there, but muffled.

So unless you go to a quieter exhaust, you will not lose the pops nor will they be less frequent. Just louder.

This is research done because I am having my NPP exhaust warranty replaced and I was scared of losing the pops.

Curious about this as well....you already know what I dealt with! No issues with this one, knock on wood....

[greg0ry]

Originally Posted by Riverside2SS

You should go for it at that price....but, make sure it has the valves. That sounds pretty low for price, so it may not.

It has the valves! Listed for 1.6k, using a coupon code lowers it to 1360..no tax no shipping! D: I live in california, though so I gotta see if I want to deal with jerk cops...(new exhaust law)

[Lithias]

Originally Posted by greg0ry

Awesome man, thank you so much for the info. What happened w/ your NPP exhaust, why are you having to deal with the warranty? 2019?

When the valves open, whether it be switching modes or when accelerating. There is a very loud metal on metal squeaking sound that can be heard in the cabin and with windows down. It's very annoying, can be intermittent, has a TSB attached to it, I had it lubed twice before GM approved the exhaust replacement. It's a more common issue on Corvettes. I have a running thread I've been updating so incase it happens to anyone else they can find it.

It's purely a first world annoyance problem, like the rattle, but it's so good damn annoying when your big V8 muscle car squeaks like a mouse when you are trying to sound mean and throaty....

[greg0ry]

Originally Posted by Lithias

When the valves open, whether it be switching modes or when accelerating. There is a very loud metal on metal squeaking sound that can be heard in the cabin and with windows down. It's very annoying, can be intermittent, has a TSB attached to it, I had it lubed twice before GM approved the exhaust replacement. It's a more common issue on Corvettes. I have a running thread I've been updating so incase it happens to anyone else they can find it.

It's purely a first world annoyance problem, like the rattle, but it's so good damn annoying when your big V8 muscle car squeaks like a mouse when you are trying to sound mean and throaty....

Oh jeez, glad you got it approved now. Let's say that I encountered the same issue on my stock NPP, if I switch to a Borla w/ NPP, would the problem go away? As in, is the problem tied to the stock NPP axleback or is it deeper than that?

[Lithias]

Originally Posted by greg0ry

Oh jeez, glad you got it approved now. Let's say that I encountered the same issue on my stock NPP, if I switch to a Borla w/ NPP, would the problem go away? As in, is the problem tied to the stock NPP axleback or is it deeper than that?

Its tied to the valve INSIDE the exhaust, which is welded in and shut. That's why the whole exhaust has to be replaced. So yes in theory it would go away.