06-23-2022, 03:31 PM | #43 |
Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,376
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My Kooks green GESI cats failed after two 20 minute sessions at the track, they were on the car for a year of street driving before that
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2018 ZL1; Mag 2650, 2" LT Headers and intake, a bunch of SPL suspension upgrades, YYZ springs, sway bars, APEX wheel and SC3R's
Last edited by GunMetalGrey; 06-23-2022 at 04:13 PM. |
06-23-2022, 04:07 PM | #44 |
Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,376
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I was told by a reputable tuner that Kooks green GESI cats are rated at 1400hp, but I wasn't told that by Kooks
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2018 ZL1; Mag 2650, 2" LT Headers and intake, a bunch of SPL suspension upgrades, YYZ springs, sway bars, APEX wheel and SC3R's
Last edited by GunMetalGrey; 06-23-2022 at 04:36 PM. |
06-23-2022, 06:51 PM | #45 |
Drives: 2021 Red Hot ZL1 Join Date: Sep 2020
Location: Gapplebees
Posts: 3,051
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06-23-2022, 06:59 PM | #46 |
Drives: 2019 ZL1 Join Date: Mar 2019
Location: NJ
Posts: 1,534
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They were probably failing on the street before your track session. I would of never known if I didn’t scope them, or until they completely plugged or blew out. Mine didn’t melt, they just got all bent inwards.
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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 |
06-23-2022, 08:38 PM | #47 |
Drives: 2019 Chevy Camaro ZL1 M6 Join Date: Jul 2019
Location: Sea level
Posts: 1,252
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What symptoms did you have when they failed? Noise? CEL?
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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
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06-24-2022, 08:34 AM | #48 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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I contacted GESI with the numbers on the “green” kooks cats, they told me the were 500hp each. I’m not there, but I’ll look at the cats soon.
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06-24-2022, 11:03 AM | #49 |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,532
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Based on the sound they make going down the track, I think mine are dead.
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'20 ZL1 1LE A10,
OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next. |
08-02-2022, 12:44 PM | #50 |
Geoff
Drives: 2020 ZL1 Green Join Date: May 2013
Location: Houston
Posts: 1,718
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Both of mine are starting to fail. I contacted Kooks about it, they rate them at 425hp each. They came back with they failed because I am running E with a flex fuel sensor. We are still in discussions. I'm below 850hp at the crank.
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08-02-2022, 12:50 PM | #51 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
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I thought E reduced egt along with a cleaner burn. how does that make sense?
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‘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) |
08-02-2022, 01:07 PM | #52 |
Drives: 2019 ZL1 Join Date: Mar 2019
Location: NJ
Posts: 1,534
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They are full of it. Mine failed on pump gas making 680whp. They all fail like this, they start to bend and once that starts it’s all downhill. I’ve got a box of 3 sets, all broken. Thankfully the gen 2’s are still holding up.
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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 |
08-02-2022, 05:33 PM | #53 |
Drives: 2022 ZL1 M6 Join Date: Mar 2022
Location: Long Beach, CA
Posts: 179
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CSP has catted headers w/ G-power V2 Ultra Cats that can withstand 1700 hp. They're pretty sweet and perform better than the green cats (over twice the capacity). They are over $3k without any type of heat coating though.
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08-02-2022, 06:29 PM | #54 |
Drives: 2019 ZL1 Join Date: Mar 2019
Location: NJ
Posts: 1,534
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It’s What’s on my car. Soon to be tested on 1k+ whp.
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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 |
09-04-2022, 08:54 PM | #55 |
Drives: 1985 Oldsmobuick Join Date: Oct 2012
Location: San Diego
Posts: 152
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How do American Racing Headers with cats hold up to track use?
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09-05-2022, 08:08 AM | #56 |
Drives: E92 BMW M3 Join Date: Oct 2012
Location: Houston
Posts: 4,496
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They don't. The cats being discussed are the most capable, and this thread is about them failing. GESI Gen II cats seem to be the best so far.
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SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs.
J-Rod Built and Matt@FSP Tuned |
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