Gutting high-flow cats: Question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Muscle SS · 07-23-2013, 12:04 PM

I have headers with high flow cats. Will I gain any extra sound or better airflow from gutting the high flow cats?
If I did gut them, would I need a tune adjustment?
Thanks guys

Bell040 · 07-23-2013, 02:17 PM

1HP... Ted did the test (with and without HF cats) during the header size tests.

not sure about the sound... I imagine it would not be much of a difference.

Personally, I would leave them as-is.

I am pretty sure that you would not need a tune adjustment.

SPCBA · 07-23-2013, 03:40 PM

sell the cats and buy pipes...

Juiced1 · 07-23-2013, 03:51 PM

Depending on your current tune, you might need to retune for the off road pipes (you'll need your rear o2 sensors turned off). You'll gain a little more volume and a bunch of rasp. Is it worth it? Probably not.

Muscle SS · 07-23-2013, 04:29 PM

Already have rear o2 sensors tuned off. And I was just wondering, if I did it myself, would it be that bad of an idea? I know plenty of car people that like the extra smell as they relate it to older muscle cars, and a little extra rasp for free is always nice.
I need to have cat in place to pass nys inspection, so I wouldn't run connecting pipes, but that's for the input

JDP Sales · 07-23-2013, 04:30 PM

I wouldn't recommend it.. You will gain minimal hp, a louder tone and a lot of rasp. If you really want to go catless, I'd sell the catted connection pipes and buy some offroad connection pipes.

Best regards,

Tyler
888-308-6007

07-23-2013, 12:04 PM	#1
Muscle SS All blackkk Drives: 2010 2SS/RS LS3 Join Date: Oct 2011 Location: Albany, NY Posts: 871	Gutting high-flow cats: Question I have headers with high flow cats. Will I gain any extra sound or better airflow from gutting the high flow cats? If I did gut them, would I need a tune adjustment? Thanks guys __________________ Drivin it like I stole it.

07-23-2013, 02:17 PM	#2
Bell040 Drives: 2SS/RS - Black - GFX Join Date: Nov 2008 Location: B'ham, Alabama Posts: 2,458 View My Garage	1HP... Ted did the test (with and without HF cats) during the header size tests. not sure about the sound... I imagine it would not be much of a difference. Personally, I would leave them as-is. I am pretty sure that you would not need a tune adjustment. __________________ Ordered: 10-13-08 Built: 3-30-09 (#1691) Recieved: 6-12-09 Blacked out, Cammed (Lunati Voodoo 233/245, .578/.598 @114°, +4°), ARH LTs, VR OTR CAI, Cutouts, and lots of other fun mods.

07-23-2013, 03:40 PM	#3
SPCBA Drives: pleather and Chiclets Join Date: Mar 2012 Location: a line somwhere Posts: 4,206 View My Garage	sell the cats and buy pipes... __________________ the power by www.cunningham-motorsports.com the brakes by www.RacingBrake.com

07-23-2013, 04:29 PM	#5
Muscle SS All blackkk Drives: 2010 2SS/RS LS3 Join Date: Oct 2011 Location: Albany, NY Posts: 871	Already have rear o2 sensors tuned off. And I was just wondering, if I did it myself, would it be that bad of an idea? I know plenty of car people that like the extra smell as they relate it to older muscle cars, and a little extra rasp for free is always nice. I need to have cat in place to pass nys inspection, so I wouldn't run connecting pipes, but that's for the input __________________ Drivin it like I stole it.

07-23-2013, 03:51 PM	#4
Juiced1 Account Suspended Drives: 2012 2SS CAMARO 45th Join Date: Apr 2011 Location: St. Charles, IL Posts: 18,663	Depending on your current tune, you might need to retune for the off road pipes (you'll need your rear o2 sensors turned off). You'll gain a little more volume and a bunch of rasp. Is it worth it? Probably not.

07-23-2013, 04:30 PM	#6
JDP Sales Drives: Chevys at the limit Join Date: Nov 2010 Location: SLC, UT Posts: 9,621	I wouldn't recommend it.. You will gain minimal hp, a louder tone and a lot of rasp. If you really want to go catless, I'd sell the catted connection pipes and buy some offroad connection pipes. Best regards, Tyler 888-308-6007