Gutted cats, but still the same sound. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Chronjuan · 05-12-2017, 08:39 PM

I had taken my 2014 SS 1LE to friend's shop to get the cats gutted. I had expected it to get quite a bit louder, but when the rest of the exhaust was connect back and everything was complete it made no difference. I also had read that someone did the same thing, and their sound increased quite a bit. Anyone have any ideas? Is most of the restriction in the mufflers?

SSMY1LE · 05-13-2017, 09:21 AM

Do you have the NPP exhaust ??

Chronjuan · 05-13-2017, 12:35 PM

Yes I do have the NPP exhaust

SSMY1LE · 05-13-2017, 12:44 PM

Most people that replace them with the cat delete pipes notice an increase in sound and performance.
Why not just delete completely ?? Better yet, long tubes !!!

Chronjuan · 05-13-2017, 01:35 PM

There shouldn't be much different between gutting the cats, and completely taking them out, right? Haha I'm On too tight of a budget right now for long tubes, but they will definitely happen in the near future

paul84043 · 05-16-2017, 01:29 PM

Stock mufflers? The stock system does an amazing job of muffling this beast. If you're just looking for sound a quick muffler delete will wake things up. I would suspect quite a bit since you did the Cat delete.

The next issue you will have will be the rasp from the H pipe..

It never ends...

DRKS1D3 · 05-19-2017, 07:54 AM

The cats are the most restrictive component of the exhaust system. When modding my SS, I first added the FM mufflers (descent sound increase). I then, added the JBA high-flow cats (major sound increase). Lastly, I added BBK headers (very little/if any sound increase). Ditch the stock cats. They are heavy, restrictive and cumbersome. Good luck.

Here's my car with the entire system I just described:

SSEssence · 05-19-2017, 10:18 AM

add muffler and resonator deletes and see if that helps.

ChibiBlackSheep · 05-19-2017, 11:35 AM

Quote:

Originally Posted by Chronjuan

There shouldn't be much different between gutting the cats, and completely taking them out, right?

The flow of the exhaust is different. With the room from a gutted cat, there is a place for the exhaust to have turbulence added, with a straight pipe, it can only go one way.

2014white2ssrs1le · 05-19-2017, 04:41 PM

Quote:

Originally Posted by paul84043

Stock mufflers? The stock system does an amazing job of muffling this beast. If you're just looking for sound a quick muffler delete will wake things up. I would suspect quite a bit since you did the Cat delete.

The next issue you will have will be the rasp from the H pipe..

It never ends...

What is this "rasp" from the H pipe you speak of?

Camaro Dude · 05-28-2017, 11:32 PM

Motor Trend has a X pipe vs H pipe dyno showdown on Engine Masters, sponsored by Amsoil, loll, but I haven't watched it yet, as I'm waiting for the free episode on YouTube to be posted up in a couple of weeks or so.

05-12-2017, 08:39 PM	#1
Chronjuan Drives: 2014 Ashen Gray 2SS1LE Join Date: May 2017 Location: Albuquerque NM Posts: 6	Gutted cats, but still the same sound. I had taken my 2014 SS 1LE to friend's shop to get the cats gutted. I had expected it to get quite a bit louder, but when the rest of the exhaust was connect back and everything was complete it made no difference. I also had read that someone did the same thing, and their sound increased quite a bit. Anyone have any ideas? Is most of the restriction in the mufflers?

05-13-2017, 09:21 AM	#2
SSMY1LE Drives: '14 1LE RS NPP Recaro Join Date: Dec 2013 Location: YYZ Posts: 1,676 View My Garage	Do you have the NPP exhaust ?? __________________ '14 1LE, Recaro, Cammed, Headers, Hi Flows, CAI, Tuned, 486 RWHP https://www.youtube.com/watch?v=H57UfKCO0EY&feature=youtu.be

05-13-2017, 12:44 PM	#4
SSMY1LE Drives: '14 1LE RS NPP Recaro Join Date: Dec 2013 Location: YYZ Posts: 1,676 View My Garage	Most people that replace them with the cat delete pipes notice an increase in sound and performance. Why not just delete completely ?? Better yet, long tubes !!! __________________ '14 1LE, Recaro, Cammed, Headers, Hi Flows, CAI, Tuned, 486 RWHP https://www.youtube.com/watch?v=H57UfKCO0EY&feature=youtu.be

05-19-2017, 10:18 AM	#8
SSEssence Instagram: Sangstah Drives: 2019 Camaro 1LE Join Date: Sep 2016 Location: Buena Park, CA. Posts: 2,802 View My Garage	add muffler and resonator deletes and see if that helps. __________________ 2019 SS 1LE - "CaSSandra" 2014 SS - "AleSSandra - Sold" 94 Z28 - Sold Follow the build https://www.camaro6.com/forums/showthread.php?t=612717

05-13-2017, 12:35 PM	#3
Chronjuan Drives: 2014 Ashen Gray 2SS1LE Join Date: May 2017 Location: Albuquerque NM Posts: 6	Yes I do have the NPP exhaust

05-13-2017, 01:35 PM	#5
Chronjuan Drives: 2014 Ashen Gray 2SS1LE Join Date: May 2017 Location: Albuquerque NM Posts: 6	There shouldn't be much different between gutting the cats, and completely taking them out, right? Haha I'm On too tight of a budget right now for long tubes, but they will definitely happen in the near future

05-16-2017, 01:29 PM	#6
paul84043 Drives: 2015 Camaro 2SS RS 1LE Join Date: Nov 2011 Location: Lehi, Utah Posts: 1,349 View My Garage	Stock mufflers? The stock system does an amazing job of muffling this beast. If you're just looking for sound a quick muffler delete will wake things up. I would suspect quite a bit since you did the Cat delete. The next issue you will have will be the rasp from the H pipe.. It never ends...

05-28-2017, 11:32 PM	#11
Camaro Dude Drives: ‘13 1LE Join Date: Jul 2013 Location: Earth Posts: 3,904	Motor Trend has a X pipe vs H pipe dyno showdown on Engine Masters, sponsored by Amsoil, loll, but I haven't watched it yet, as I'm waiting for the free episode on YouTube to be posted up in a couple of weeks or so.