Axleback w Largest volume difference between open/closed valve

Nightfall1LEKM · 09-05-2019, 09:51 AM

Hey Guys,
I am about to go ahead and have headers installed but my current catback setup is going to be way too loud all the time w valves opened or closed. Is there an npp exhaust that has the greatest noise difference when the valves are closed. Is it the Borla Atak, Stype, Magnaflow, ect?
I know the Atak is louder but is it the same volume as the Stype when the valves are closed on both systems?

Edit: no longer installing headers. Still interested in everyone’s opinions.

staples87 · 09-05-2019, 10:59 AM

Quote:

Originally Posted by Nightfall1LEKM

Hey Guys,
I am about to go ahead and have headers installed but my current catback setup is going to be way too loud all the time w valves opened or closed. Is there an npp exhaust that has the greatest noise difference when the valves are closed. Is it the Borla Atak, Stype, Magnaflow, ect?
I know the Atak is louder but is it the same volume as the Stype when the valves are closed on both systems?

Catted or non-catted headers? The ATAK axleback will be raspy on non-catted setups and ear-piercingly loud. I'd recommend the S Type.

Magnaflow is going to rattle your brain with the amount of drone, you'll hate it.

Nightfall1LEKM · 09-05-2019, 08:42 PM

Non Catted headers, will even the Stype drone with non cats? Should I have a resonator installed.

Revalot · 09-05-2019, 10:02 PM

I have the Atak 2nd cats removed, and it sounds great ! No drone, Barks when you fire it up, put it on stealth mode and it sounds like a stock SS !

staples87 · 09-09-2019, 09:43 AM

Quote:

Originally Posted by Nightfall1LEKM

Non Catted headers, will even the Stype drone with non cats? Should I have a resonator installed.

I think you should run the S Type by itself first then you could make that call. If you're looking for something that is aggressive under wide open then I wouldn't do the resonators. If you feel it's too loud or not the right side you're looking for then I would add the resonators later. S Type WILL NOT drone, as long as you're running the NPP version.

If you went with the ATAK then I would definitely recommend resonators.

Zigg L1 · 09-09-2019, 10:46 AM

I have the Kooks headers high flow cats and the Borla Stype catback sounds great until WOT damn it is loud!! Coold Starts wow loud. I am going to add either borla resonator or some magnaflow 14419 to tone it down. Having a hard time making my mind up on which to install

AZzl1 · 09-09-2019, 11:02 AM

I just got an ARH long system (with cats) on my ZL1 a couple days ago (along with a pulley change and tune). I kept the stock suitcase muffler. It is way loud when accelerating with the exhaust valves open and also sounds a little weird in stealth mode when accelerating aggressively. I'll be looking for a new axleback set up myself.

09-05-2019, 09:51 AM	#1
Nightfall1LEKM Drives: Chevy ZL1 1LE. Ram 2500. Join Date: Jun 2019 Location: Orlando Posts: 55	Axleback w Largest volume difference between open/closed valve Hey Guys, I am about to go ahead and have headers installed but my current catback setup is going to be way too loud all the time w valves opened or closed. Is there an npp exhaust that has the greatest noise difference when the valves are closed. Is it the Borla Atak, Stype, Magnaflow, ect? I know the Atak is louder but is it the same volume as the Stype when the valves are closed on both systems? Edit: no longer installing headers. Still interested in everyone’s opinions. Last edited by Nightfall1LEKM; 09-10-2019 at 08:20 AM. Reason: Trading the car in

09-05-2019, 08:42 PM	#3
Nightfall1LEKM Drives: Chevy ZL1 1LE. Ram 2500. Join Date: Jun 2019 Location: Orlando Posts: 55	Non Catted headers, will even the Stype drone with non cats? Should I have a resonator installed.

09-05-2019, 10:02 PM	#4
Revalot Drives: ZL1/1LE parts added Join Date: May 2018 Location: Somewhere around Texas pines tress and smooth asphalt Posts: 625	I have the Atak 2nd cats removed, and it sounds great ! No drone, Barks when you fire it up, put it on stealth mode and it sounds like a stock SS !

09-09-2019, 10:46 AM	#6
Zigg L1 Drives: 2018 ZL1 Garnet Red Tintcoat A10 Join Date: Jan 2019 Location: NY Posts: 537	I have the Kooks headers high flow cats and the Borla Stype catback sounds great until WOT damn it is loud!! Coold Starts wow loud. I am going to add either borla resonator or some magnaflow 14419 to tone it down. Having a hard time making my mind up on which to install

09-09-2019, 11:02 AM	#7
AZzl1 Drives: 2017 ZL1 - NFGM Join Date: Jun 2017 Location: Gilbert, AZ Posts: 13	I just got an ARH long system (with cats) on my ZL1 a couple days ago (along with a pulley change and tune). I kept the stock suitcase muffler. It is way loud when accelerating with the exhaust valves open and also sounds a little weird in stealth mode when accelerating aggressively. I'll be looking for a new axleback set up myself.

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