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#1 |
![]() Drives: Chevrolet Chevy Join Date: May 2022
Location: California
Posts: 322
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Options for making stock NPP Louder?
Might be pre-mature as the car is still in the break-in period and I'm not exceeding 4k RPM's, but is it me or is the car really quiet down low? Fuse has already been pulled.
I really don't like the fact that you can not simply bolt a cat-back onto these cars. I don't want to do headers and want to keep all the cats. Am I out of luck or will an Axle-back help me out here? |
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#2 |
Account Suspended
Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
Posts: 662
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Axleback will replace the stock NPP exhaust. You can get an aftermarket npp system like corsa or borla but they are big $$ for nothing but sound. You need to delete the cats or just get long tubes.
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#3 |
![]() ![]() ![]() ![]() ![]() ![]() ![]() Drives: 23 ZL1 A10 Rapid Blue Join Date: Aug 2020
Location: MO
Posts: 2,023
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For making what you already have louder? No, nothing to do there.
Cat backs do indeed bolt up not sure where you go that...? |
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#4 | |
![]() Drives: 2018 1SS 1LE Join Date: Dec 2012
Location: NY
Posts: 398
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Quote:
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#5 |
![]() ![]() ![]() Drives: 2016 Camaro 2SS Join Date: Apr 2017
Location: Stansbury Park, Utah
Posts: 1,095
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I pulled the fuse too. Still wasn’t loud enough. So I bought MBRP 3” axle back. Sounds awesome with no drone. Black tips are a plus. I just happen to be selling them. Hit me up if you’re interested.
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2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000
New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth. |
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#6 |
![]() Drives: Chevrolet Chevy Join Date: May 2022
Location: California
Posts: 322
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#7 |
![]() Drives: Chevrolet Chevy Join Date: May 2022
Location: California
Posts: 322
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#8 |
![]() ![]() ![]() ![]() ![]() Drives: 19' ZL1 A10, w/pdr Join Date: Sep 2014
Location: S.W. ohio
Posts: 1,586
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These cars have ZERO sound deadening. This is what real sound deadening looks like.
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BTR Stg II cam w/ 38% fuel lobe, ARH 2" headers into 3" w/cats, Kong X port, Weapon X triple ht exchangers, NW 103, Rotofab big gulp, DSX lowside, TCM tune, BMR Lockout, Mustang dyno 720 rwhp, 634 rwtq on 93 pump.
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