06-12-2021, 06:41 AM | #1 |
Drives: 18 ZL1 1LE Join Date: Apr 2013
Location: Florida
Posts: 702
|
Header question…run cats or go catless
Florida car so no emissions testing
I’ll looking to put a set of 2” Kooks coated headers on my car & I’m trying to decide if I want to run green cats or just go catless. I already have a AWE touring catback non resonated & performance link pipes on the car. I don’t want the car to be super raspy or drone. Not a daily so I don’t mind it being loud, but then again I don’t want it to be obnoxiously loud as well. I still have the factory suitcase so I could always throw that back on as well. I know the green cats will rob a little bit of HP, but any advantage of running green cats? |
06-12-2021, 06:43 AM | #2 |
Drives: 2010 Camaro SS 2011 Mustang GT Join Date: Apr 2011
Location: Huntington WV
Posts: 356
|
Well if you're cammed and catless and run with windows down it gets stinky in car, my wife hates that
Sent from my SM-N960U using Tapatalk |
06-12-2021, 07:38 AM | #3 |
I went with 2” headers, off-road mid pipes, to stock suitcase. IMO the smell isn’t that bad, not like I’m standing behind the car for long durations. I wouldn’t let it idle in garage, start and pull it out to warm up.
__________________
CSP 755 Package. 2” headers, Kong ported blower, NW103mm TB, RF Big Gulp, Mighty Mouse catch can.
630rwhp/660rwtq. |
|
06-12-2021, 07:47 AM | #4 |
Shifts under load
Drives: 2020 Camaro 1SS 1LE rally green Join Date: Apr 2017
Location: Fuquay-Varina, NC
Posts: 1,295
|
I've been a catted header guy forever, but my local shop showed me a pile of aftermarket cats that had melted or broken down internally and said hardly any of them don't do it. I think I'm gonna go TSP 2" catless connection pipes this time and see how it goes. I can always add cats later.
__________________
24 Audi S3 prem plus, sport package
HPDE - southeast - JTI- solo, PCA- blue. 22 Suzuki GSX-S 1000GT blue |
06-12-2021, 07:48 AM | #5 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
|
Forgive me if I’m wrong but you should work the tune to keep the cats from melting as a priority over max power. So there are different fuel and timing targets. Different tunes.
__________________
‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
06-12-2021, 08:52 AM | #6 |
Drives: 2019 Chevy Camaro ZL1 M6 Join Date: Jul 2019
Location: Sea level
Posts: 1,252
|
I’m running ARH coated headers and their high flow cats. I went with the ARH mid X pipe. I paired that into the AWE catback which also has an X. So I now have dual X pipe mids. Sounds amazing but pretty loud. Not raspy IMHO. But it’s a good sounding loud LOL.
__________________
Kong Stage X Port, NW103, LPE HPFP, XDI +30 Injectors, ARH Headers, Flex Fuel, JMS Booster, AWE Touring, Elite E2-X CC. Stock heads, stock cam, stock pulleys: Tuned by KingLT1. 740whp Uncorrected on e50
|
06-12-2021, 08:56 AM | #7 |
Drives: 2019 Camaro 2SS Join Date: Aug 2020
Location: McCordsville, Indiana
Posts: 621
|
Take a look at the CSP 2” headers with their “ultra” CATs. It’s GESI Gen 2 I believe. I have a set on order. Claim 850hp per bank (1700hp total). Granted no stories on how they hold up, but I have to believe much better then the green cats which I think are Gen 1 and only rated for 400hp per bank.
If you want cats...
__________________
2019 Shock 2SS A10. 2650@10psi/LPE HPFP/XDI+30/LT4 LPFP+JMS/Soler 95mm/Rotofab, E65, CSP 2” Headers/GESI GenII Cats. MM Wild/GM SG3 suspension/1LE Brakes, Velgen VF5 Wheels/GY SC3. JRE Tuned.
|
06-12-2021, 10:27 AM | #8 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
|
I wonder how much power csp headers give up to make it easier for them to install them?
__________________
‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) Last edited by 6spdhyperblue; 06-12-2021 at 11:06 AM. |
06-12-2021, 11:40 AM | #9 |
Oh Oh it's Friday Night!
Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018
Location: Walton Woods
Posts: 1,061
|
2 inch ARH headers, no cats, full ARH system here. Very nice fit. Has a deep “muscle car” sound, it has a low tone rumble around town but a very loud roar at part throttle. Zero rasp which is unusual for no cats. There is some drone to be honest, but not any where near an obnoxious level. I think if I were to run cats on a FI engine, I’d go with the GESI cats to be safe.
__________________
2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm
Four that wanna own me Two that wanna stone me One says she's a friend of mine... |
06-12-2021, 02:58 PM | #10 | ||
Drives: 2019 Chevy Camaro ZL1 M6 Join Date: Jul 2019
Location: Sea level
Posts: 1,252
|
Quote:
Short vid for reference of 1 7/8” ARH with ARH high flow cats into AWE Touring exhaust with dual x-pipes. *Disregard the choice of music. I’m admittedly stuck in the 80s LOL. http://youtu.be/RuGmNB6e6f8
__________________
Kong Stage X Port, NW103, LPE HPFP, XDI +30 Injectors, ARH Headers, Flex Fuel, JMS Booster, AWE Touring, Elite E2-X CC. Stock heads, stock cam, stock pulleys: Tuned by KingLT1. 740whp Uncorrected on e50
|
||
06-12-2021, 04:26 PM | #11 |
Drives: 2017 ZL1 Join Date: Apr 2020
Location: South florida
Posts: 332
|
I have ARH 17/8 with w cats and ARH long system to factory suitcase. Sounds primal at wot. 18000 on cats so far so good. Approx 750 at crank
__________________
2017 ZL1 M6 Silver Ice Metallic
|
06-12-2021, 06:47 PM | #12 | |
Drives: 2019 ZL1 Join Date: Mar 2019
Location: NJ
Posts: 1,534
|
Quote:
None, there headers are custom made stainless works headers, now also fabricated to fit the gesi gen 2 cats. I currently have kooks 2" and green cats, went through 2 sets of green cats already. Im swapping out for CSP headers and the new gen 2 cats. See my thread for info.
__________________
928rwhp - 93 | 1040rwhp/898rwrq - E65 SAE
LME 377 LT4 Short Block | Magnuson 2650 80mm upper w/13% lower (9.06) | DSX Lid & Valve Covers | CSP Custom Cam w/32% fuel lobe | CID Heads | NW 103mm TB | Roto Fab Big Gulp | CSP 2" Headers w/Green GESI Gen 2 Cats | Borla 3" Full Cat Back w/ S-Type| Mighty Mouse Wild Catch Can| Custom Holley Low side Fuel system| TooHigh PSI Port Injection w/Holley Controller | Forced Inductions Interchiller w/2 gallon fender tank | TK Performance built 10L90 |
|
06-12-2021, 09:08 PM | #13 | ||
CamaroFans.com
|
Quote:
|
||
06-12-2021, 09:17 PM | #14 |
CamaroFans.com
|
Here's the last set of cats I will every have with headers.
ARH high flow after a day at the road track. One was stuck in the X-pipe... some hanging out the tail pipe. And took out a couple O2 sensors as they blew out. |
|
|
Post Reply
|
Thread Tools | |
|
|