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05-01-2019, 12:55 PM
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#1 |
 Drives: SS Join Date: Apr 2019
Location: Northeast
Posts: 30
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Removing HF Cats from my Exhaust Setup: How much Louder?
Hey everyone!
So I have a 2014 SS M6. I have ARH 1 7/8 Headers along with there High Flow Cats, and X pipe. I then have Borla S type mufflers. I plan to boost the car and will be getting rid of the cats. I am wondering, how much louder will the car be if I remove the HF Cats? Will it be significantly louder? I do not care if it has more rasp in the upper RPM range and the smell. Just trying to decide if I will have to modify the exhaust system to quiet it down. Any help, info, or experience would be greatly appreciated thanks! |
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05-01-2019, 01:14 PM
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#2 |
   Drives: Z06 wannabe Join Date: Feb 2015
Location: Daytona Beach, FL
Posts: 1,200
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I did not notice a huge difference removing mine. Went a similar route in front of stock catback...LTs with Hi flo, then gutted the HF cats when I went S/C.
She revs up alot faster post boost, but to me, the sound from Hi flo cats to offroad pipes was marginal. Said differently, it does increase the decibels but for me it wasn't enough to matter. Worse case add some small bullet resonators later if you dont like it.
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Apex Focused
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05-01-2019, 01:41 PM
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#3 |
 
Drives: 2023 Camaro ZL1 1LE Join Date: Feb 2016
Location: Middletown, DE
Posts: 340
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Most likely won't be a huge difference, but definitely noticeable.
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2014 Camaro SS Spring Edition LSX440ci
LSX Block, MAST 305 Black Labels, Exceldyne Valves, Diamond Pistons, Callies Crank & Rods, Cam Motion Cam, Johnson 2116LSR Lifters, Comp XDA Pushrods, Jesel Rockers, Mamo MSD, NW 102, Roto-Fab CAI, FAST 65# Injectors, ZL1 Fuel Pump, Kooks 2" Headers, Corsa Sport 3" Catback, Z28 Shifter, ZR1 Clutch, Katech LW Flywheel, 1LE 3.91 Diff, LPW Diff Cover, BMR - 1.4" Springs, LCA's, Trailing Arms, Toe Rods, Sway Bars, End Links, Diff Bushings, and Tunnel Brace, Z28/1LE Strut Tower Brace, Improved Racing Oil Cooler 2023 Camaro ZL1 / 1LE Stock  |
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05-01-2019, 01:49 PM
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#4 |
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AKA "Beefcake"
Drives: 2023 ZL1 Sharkskin Join Date: Oct 2009
Location: Indy
Posts: 8,529
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as stated, very little difference.
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05-01-2019, 03:24 PM
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#5 |
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Instagram: Sangstah
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Probably not much louder, just a difference in tone.
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2019 SS 1LE - "CaSSandra" 2014 SS - "AleSSandra - Sold" 94 Z28 - Sold
 Follow the build https://www.camaro6.com/forums/showthread.php?t=612717 |
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05-02-2019, 08:12 AM
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#6 |
       Drives: 2010 Camaro SS/RS Join Date: Mar 2014
Location: somewhere in MD
Posts: 4,883
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You'll get all of the rasp with a bit more volume
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2010 2SS/RS
Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53 |
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05-02-2019, 09:53 AM
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#7 |
Drives: 2011 2SS/RS LS3 Join Date: Apr 2017
Location: Dallas
Posts: 482
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Boost it, delete the cats and add e85. Your exhaust will smell like Iowa corn fields.
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GPI Built Procharger D-1/13 PSI/Race Intercooler/SS3 Cam Kit/Kooks LTH/X- pipe/FIC 1050/E85/3.91 gears/Centerforce Dual Disc clutch/Flowmaster Outlaw/775whp/680tqSOLD
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05-02-2019, 11:28 AM
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#8 | |
Drives: 2010 2SS Coupe; 2011 2LT Vert Join Date: Dec 2018
Location: Prosper, TX
Posts: 458
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Quote:
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2010 2SS/RS LS3 - K&N, GM Performance Axle Back, Hurst Shifter, TSP 1 7/8ths long tubes no cats, TSP Stage 2 "Bald Eagle" cam, GM 3.91, 466whp/429tq
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05-02-2019, 11:34 AM
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#9 | |
Drives: '14 BRM 1LE 2SS/RS Join Date: Nov 2017
Location: Ft. Wayne, IN
Posts: 801
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Quote:
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592 HP/590 TQ
LSA Blower w/ 2.45 Griptec, Reinforced Brick, FIC 1000 injectors, JRE FPCM, LFP Dual Pass HX, ZL1 IC pump, RotoFab CAI, Bo White TB, Coated Stainless Power 1-7/8" LTs, NPP, NGK TR7IX, Mighty Mouse Wild CC, AEM X-Series WB, Aeroforce Interceptor, MGW Shifter, Z28 Grill, Gary's Custom ZL1 Rockers, Hero Tails, Tuned by IMC |
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05-02-2019, 01:30 PM
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#10 | |
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Drives: 2011 2SS/RS LS3 Join Date: Apr 2017
Location: Dallas
Posts: 482
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Quote:
Like all the other cars I've owned and cat deleted, the rasp is very noticeable around 3k rpm vs with cats. But, she purs like a kitten from 4-5k rpm.
__________________
GPI Built Procharger D-1/13 PSI/Race Intercooler/SS3 Cam Kit/Kooks LTH/X- pipe/FIC 1050/E85/3.91 gears/Centerforce Dual Disc clutch/Flowmaster Outlaw/775whp/680tqSOLD
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05-03-2019, 02:29 PM
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#11 |
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Drives: SS Join Date: Apr 2019
Location: Northeast
Posts: 30
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Hey everyone, I just want to say thanks for all the feedback on this I really appreciate it! The overall consensus seems to be it won't be that much louder, so I think that would be fine for me.
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