sound difference with just High Flow cats added? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

jshaf · 04-30-2014, 10:37 AM

how much of an increase in sound volume would I expect from just high flow cats? like the sound of my Retro cat back but could stand for it to be a slight bit louder, would High flow cats give me a slight sound increase with out CEL and tune being needed?

digdeep0169 · 04-30-2014, 10:41 AM

guaranteed it will get louder! as for the cel being thrown, it's a hit & miss. my high flow cats threw a cel, reset them, they still threw again. i will need a tune to disable it.

ProfessorRhone · 04-30-2014, 11:11 AM

Better sound, yes! CEL throws seem to be hit and miss from different users. From what I've seen SOLO HF Cats with O2 extenders seem to be the better option for no CEL. Not to say that others have more issues or SOLO has none. It just seems that the users with SOLO's have had less problems. As long as they aren't throwing CELs no tune is needed.

huitt06 · 04-30-2014, 11:53 AM

Much deeper and louder...warning you though, you will want longtube headers soon after lol...sound is addicting!

Sent from your mom's iPhone

SS PANTHER · 05-02-2014, 05:22 AM

It will sound good and perform even better. Get the Solos. I have not had a cel.

sloSS · 05-02-2014, 07:33 AM

Had JBA's on mine, just the right sound increase IMO.
With CAI, Apex scoop, VMAX, and JBA cats my car's dyno numbers were 368/370 factory cats, 391/393 with JBA's. Same dyno.
And just like huitt06 mentioned, after one year with the high flow cats I now have ARH long tubes and cam...

Jason@JacFab · 05-02-2014, 03:41 PM

Here's a couple videos to maybe give you an idea of the sound change...

Stock cats, Dynomax #39494 Axleback, resonator and X-pipe delete
http://youtu.be/vPAhHGwcfoo

High flow cats added to the same combo from above
http://youtu.be/Z6ncc-CQLOo?t=11s

I did experience some rasp, most likely because I removed the resonators, but I don't know if even the factory ones would have cured it. I think a Magnaflow resonated X pipe would have helped a lot.

akonechn · 05-02-2014, 09:10 PM

Definitely a noticeable sound increase. Really woke up my Solo Mach-X exhaust I already had installed. I just took my Solo HFCs off to install Pfadt Tri-Y headers and if anything my car is now just a bit quieter than it was before with the HFCs. All in all, the Solo HFCs are a great mod if you want power, sound, and able to retain factory warranty with no CEL.

If you have an LS3, I'm selling the HFCs off my car

rontammy0 · 05-02-2014, 11:11 PM

Heres my solo hi flows with the magnaflow muffler delete before headers.
http://youtu.be/U6MB4yUwVKA

FB3 · 05-03-2014, 09:38 PM

The Solo hi flow cats on my car with the npp exhaust deepened and increased the exhaust sound some. I installed the Magnaflow resonated X pipe on mine also. I did have a problem with a CEL, but after adding another O2 sensor spacer it has not come back. At least so far.

cal45 · 05-03-2014, 10:15 PM

Mine is loud enough as it has the stock manifolds, Solo HF cats, and the Solo Mach XL cat back.

digdeep0169 · 05-08-2014, 01:01 PM

CAI, doug thorley short tube headers, SOLO high flow cats, non-res X-pipe, and Borla Atak Axleback exhaust:

VR Baron · 05-09-2014, 10:58 PM

I have whats in my sig. Res Xpipe needed to tame the loudness but mostly t he decel is to much. However I miss the old sound and so do the neighbors!

InfernoB · 11-20-2016, 08:37 PM

Quote:

Originally Posted by akonechn

Definitely a noticeable sound increase. Really woke up my Solo Mach-X exhaust I already had installed. I just took my Solo HFCs off to install Pfadt Tri-Y headers and if anything my car is now just a bit quieter than it was before with the HFCs. All in all, the Solo HFCs are a great mod if you want power, sound, and able to retain factory warranty with no CEL.

If you have an LS3, I'm selling the HFCs off my car

Am I understanding you correctly; are you actually saying that your car was LOUDER with the factory manifolds and High Flow Cats, than it is with PFADT LT Headers? Are you running High Flow Cats with your LT Headers? Seems backwards from what most people claim and describe?

04-30-2014, 10:37 AM	#1
jshaf Montani Semper Liberi Drives: 2011 Black 2SS/RS w/ IOM stripes Join Date: Feb 2010 Location: Masontown, WV Posts: 4,841	sound difference with just High Flow cats added? how much of an increase in sound volume would I expect from just high flow cats? like the sound of my Retro cat back but could stand for it to be a slight bit louder, would High flow cats give me a slight sound increase with out CEL and tune being needed? __________________ Stainless Works 1 7/8 Long Tude Headers, Stainless Works High Flow Cats, Stainless Works Retro Chambered Catback, Z/28 Air Intake, RDP Tuned, FR41 Chrome Rims, 1100W stereo, 35% Tint

04-30-2014, 10:41 AM	#2
digdeep0169 Drives: 2012 Camaro SS 45th Anniversary Join Date: Sep 2013 Location: Albuquerque Posts: 963 View My Garage	guaranteed it will get louder! as for the cel being thrown, it's a hit & miss. my high flow cats threw a cel, reset them, they still threw again. i will need a tune to disable it. __________________ ~ 2012 SS ~

04-30-2014, 11:53 AM	#4
huitt06 Drives: 2011 L99 SS Join Date: Mar 2012 Location: West texas Posts: 319 View My Garage	Much deeper and louder...warning you though, you will want longtube headers soon after lol...sound is addicting! Sent from your mom's iPhone __________________ TSP 1 7/8, CNT catback, VMAX, CAI intake, ADM scoop, 3.70s, Adm Tuned(374/391), SLP UDP, 18" nurbs/NT05r's , 3200 stall, Granatelli trailing arms....1/4 mi best 12.7

05-02-2014, 09:10 PM	#8
akonechn Drives: 2012 Black 2SS Join Date: Apr 2012 Location: Indianapolis, IN Posts: 117	Definitely a noticeable sound increase. Really woke up my Solo Mach-X exhaust I already had installed. I just took my Solo HFCs off to install Pfadt Tri-Y headers and if anything my car is now just a bit quieter than it was before with the HFCs. All in all, the Solo HFCs are a great mod if you want power, sound, and able to retain factory warranty with no CEL. If you have an LS3, I'm selling the HFCs off my car __________________ 2012 Chevrolet Camaro 2SS Black \| RS Package \| Hurst Short Throw Shifter \| Sunroof \| Polished Wheels Pfadt Tri-Y Headers \| Solo Mach X Catback \| C.A.I. Intake \| Vmax \| Apex Intake Scoop & Washer Tank \| Tuning by Mike Norris Polished OEM Strut Brace \| Black Front Bowtie \| C6 Flags Rear Emblem \| Black Tail Light Bezels \| Window Tint \| Stealth Turn Signal Bulbs Ghosted Black LED Sidemarkers \| Plasma LED DRL \| DRL Harness \| ABL LED Dome Light \| LED Trunk & License Plate Lights

05-03-2014, 09:38 PM	#10
FB3 Drives: 2014 Camaro 2SS RS LS3, BRM, NPP Join Date: Apr 2010 Location: Miami, FL Posts: 411	The Solo hi flow cats on my car with the npp exhaust deepened and increased the exhaust sound some. I installed the Magnaflow resonated X pipe on mine also. I did have a problem with a CEL, but after adding another O2 sensor spacer it has not come back. At least so far. __________________ Experience is the best teacher but the tuition is very high.

04-30-2014, 11:11 AM	#3
ProfessorRhone Drives: '14 2SS/RS 1LE Join Date: Mar 2014 Location: Dallas, TX Posts: 266 View My Garage	Better sound, yes! CEL throws seem to be hit and miss from different users. From what I've seen SOLO HF Cats with O2 extenders seem to be the better option for no CEL. Not to say that others have more issues or SOLO has none. It just seems that the users with SOLO's have had less problems. As long as they aren't throwing CELs no tune is needed. __________________ PR ---------------------------------------------- 2014 CRT 2SS/RS 1LE Dual-Mode, Recaros, Sunroof, Nav ---------------------------------------- ZL1 Rockers RPI Stealth Splash Guards De-badged (except blacked-out front bowtie)

05-02-2014, 05:22 AM	#5
SS PANTHER Drives: 2013 SS Supercharged Convertible Join Date: May 2013 Location: SoCal Posts: 2,714	It will sound good and perform even better. Get the Solos. I have not had a cel.

05-02-2014, 07:33 AM	#6
sloSS Drives: 2012 Camaro 1SS RS LS3 Join Date: Feb 2012 Location: Atlanta Posts: 254 View My Garage	Had JBA's on mine, just the right sound increase IMO. With CAI, Apex scoop, VMAX, and JBA cats my car's dyno numbers were 368/370 factory cats, 391/393 with JBA's. Same dyno. And just like huitt06 mentioned, after one year with the high flow cats I now have ARH long tubes and cam...

05-02-2014, 03:41 PM	#7
Jason@JacFab Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008 Location: Central Point, OR Posts: 5,688 View My Garage	Here's a couple videos to maybe give you an idea of the sound change... Stock cats, Dynomax #39494 Axleback, resonator and X-pipe delete http://youtu.be/vPAhHGwcfoo High flow cats added to the same combo from above http://youtu.be/Z6ncc-CQLOo?t=11s I did experience some rasp, most likely because I removed the resonators, but I don't know if even the factory ones would have cured it. I think a Magnaflow resonated X pipe would have helped a lot.

05-02-2014, 11:11 PM	#9
rontammy0 Account Suspended Drives: 2011 2SS/ RS INFERNO ORANGE L99 Join Date: Dec 2012 Location: Alliston Ontario Canada Posts: 9,057 View My Garage	Heres my solo hi flows with the magnaflow muffler delete before headers. http://youtu.be/U6MB4yUwVKA

05-03-2014, 10:15 PM	#11
cal45 Drives: 2015 Blue Velvet Metallic ZL1 Join Date: Nov 2013 Location: Orlando & Flagler Beach,FL Posts: 1,453	Mine is loud enough as it has the stock manifolds, Solo HF cats, and the Solo Mach XL cat back.

05-09-2014, 10:58 PM	#13
VR Baron SoCal Camaro5 Race Team Drives: 2021 Shadow Grey Camaro 2SS 1LE Join Date: Mar 2010 Location: SO CAL Posts: 14,288	I have whats in my sig. Res Xpipe needed to tame the loudness but mostly t he decel is to much. However I miss the old sound and so do the neighbors!