ZL1 2" Kooks Headers-Driver side rubbing

TDS · 05-12-2018, 02:39 PM

Anyone have 2" Kooks installed on there car that can confirm the fitment is good. I knew they would be tight but in a hard right hand corner with throttle the driver side header is rubbing the side. Took me several test drives to figure that out by the way! Had a vibration and for the life of me could not find it. The headers were installed by a shop over the winter and last weekend was the first time this year I could take the car for some spirted driving in the country. I but the car in the air and disconnected the connection pipes to make sure they were not torqueing on the engine. Actually made it worse, with the connection pipes off there was less then a 1/16 inch gape between the header and left side. I will call Kooks on Monday but in the mean time I was wanting to know if this is a on going problem. I have had Kooks on the last 3 cars with Zero issue. Hope they stand be hide there product. There warranty on there web site says they take back defective product with a RMA# and the buyer has to pay shipping. That does not seem right to me. What about labor? Knda hard to see in the pictures but you can see were the paint is rubbed off.

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ssrallyred · 05-12-2018, 02:52 PM

I have 1 7/8 Kook's. I installed them myself. The driver side was a VERY tight fit going in but its been 6 months now and no problems. I called Kook's before I ordered mine and they said unless you were going to be north of a 1000 rwhp the 2 inch wouldn't really make much difference. Hell as tight as the 1 7/8 were I don't if I could have got them to go in lol

chicagosam · 05-12-2018, 05:06 PM

Ill take a look at my 2" Kooks install this weekend.
From your pics, I cant see the rubbing. Can you circle the section in one of the pics and repost - I will look at mine.

TheElementalCashew · 05-12-2018, 05:07 PM

2” Kooks here, no rubbing.

danhr · 05-12-2018, 05:11 PM

Looks like a solid reason to go to poly or solid motor mounts to me.

TDS · 05-12-2018, 05:59 PM

Quote:

Originally Posted by chicagosam

Ill take a look at my 2" Kooks install this weekend.
From your pics, I cant see the rubbing. Can you circle the section in one of the pics and repost - I will look at mine.

The shadow on the left side of the circle is actually the tube.
You can see a hole in the frame wall and just the front of that you can see were the paint has rubbed off
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rjacobs · 05-12-2018, 06:30 PM

I would "persuade" both the sheet metal and the header tube JUST a fraction each with a hammer. Im talking a tiny bit each. Let both have some love. You will lose zero power.

zackf80m · 05-13-2018, 10:47 AM

Quote:

Originally Posted by TDS

Anyone have 2" Kooks installed on there car that can confirm the fitment is good. I knew they would be tight but in a hard right hand corner with throttle the driver side header is rubbing the side. Took me several test drives to figure that out by the way! Had a vibration and for the life of me could not find it. The headers were installed by a shop over the winter and last weekend was the first time this year I could take the car for some spirted driving in the country. I but the car in the air and disconnected the connection pipes to make sure they were not torqueing on the engine. Actually made it worse, with the connection pipes off there was less then a 1/16 inch gape between the header and left side. I will call Kooks on Monday but in the mean time I was wanting to know if this is a on going problem. I have had Kooks on the last 3 cars with Zero issue. Hope they stand be hide there product. There warranty on there web site says they take back defective product with a RMA# and the buyer has to pay shipping. That does not seem right to me. What about labor? Knda hard to see in the pictures but you can see were the paint is rubbed off.

Having a similar issue, the header is actually rubbing on the steering rack. Same symptoms when making a hard right turn!

TDS · 05-13-2018, 11:50 AM

Quote:

Originally Posted by zackf80m

Having a similar issue, the header is actually rubbing on the steering rack. Same symptoms when making a hard right turn!

I just went and looked at mine. It is also hitting the steering shaft. This picture is with the tires straight. So when I turn right those melt marks are right against the header and that the white mark on the header tube is melted plastic. Not cool! The melt marks prove one thing, they do not rub under hard straight line acceleration which means the body has a ton flex in it. Might be time to try the BRM strut tower brace. Maybe that would take out just enough flex to make them not rub. Defiantly calling Kook on Monday.

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*mlee* · 05-13-2018, 11:55 AM

Well known issue with Kooks and the LT4

TDS · 05-13-2018, 12:24 PM

Quote:

Originally Posted by mlee

Well known issue with these and the LT4

Which part?

*mlee* · 05-13-2018, 01:02 PM

Quote:

Originally Posted by TDS

Which part?

I thought we were talking about Kooks headers hitting the steering shaft.

Here's one example

https://www.camaro6.com/forums/showp...6&postcount=49

TDS · 05-13-2018, 01:14 PM

I did know if you were talking about that or the frame

drfeelgood · 05-13-2018, 01:24 PM

thank for the info. This makes header choice a little clearer now.

05-12-2018, 02:39 PM	#1
TDS Drives: 2019 Jeep Rubicon Sold:2017 ZL1 A10 Join Date: Feb 2017 Location: Scappoose, OR Posts: 560	ZL1 2" Kooks Headers-Driver side rubbing Anyone have 2" Kooks installed on there car that can confirm the fitment is good. I knew they would be tight but in a hard right hand corner with throttle the driver side header is rubbing the side. Took me several test drives to figure that out by the way! Had a vibration and for the life of me could not find it. The headers were installed by a shop over the winter and last weekend was the first time this year I could take the car for some spirted driving in the country. I but the car in the air and disconnected the connection pipes to make sure they were not torqueing on the engine. Actually made it worse, with the connection pipes off there was less then a 1/16 inch gape between the header and left side. I will call Kooks on Monday but in the mean time I was wanting to know if this is a on going problem. I have had Kooks on the last 3 cars with Zero issue. Hope they stand be hide there product. There warranty on there web site says they take back defective product with a RMA# and the buyer has to pay shipping. That does not seem right to me. What about labor? Knda hard to see in the pictures but you can see were the paint is rubbed off. __________________ Travis SOLD ZL1 Summit White, A10, Black Strip, PDR, ZL1 floor mats Ordered 2/11, 2000 2/14, 3000 2/20, 3100 2/24, 3300 3/7, 3400 3/8, 4300 3/16, 4B00 3/21 Bayed at train yard in Ohio, 4200 3/26 All Abroad for the West Coast, 4800 4/4 Deliverd to portland train yard, 5000 4/7 3:00AM Deliverd to Dealer, 6000 4/7 6:45PM Delivered to Customer Last edited by TDS; 05-18-2018 at 04:55 PM.

05-12-2018, 02:52 PM	#2
ssrallyred Drives: 2017 Summit White ZL1 M6 Join Date: May 2017 Location: B'ham AL Posts: 189	I have 1 7/8 Kook's. I installed them myself. The driver side was a VERY tight fit going in but its been 6 months now and no problems. I called Kook's before I ordered mine and they said unless you were going to be north of a 1000 rwhp the 2 inch wouldn't really make much difference. Hell as tight as the 1 7/8 were I don't if I could have got them to go in lol __________________ Roto Fab/ Kook's LT's,ported blower,removed lid baffle/ 103mm TB' lower pulley and tune. 651/660.

05-12-2018, 05:06 PM	#3
chicagosam Drives: 2017 BLACK ZL1 A10 Join Date: Jan 2018 Location: Chicago Posts: 109	Ill take a look at my 2" Kooks install this weekend. From your pics, I cant see the rubbing. Can you circle the section in one of the pics and repost - I will look at mine. __________________ '17 Mosaic ZL1 Katech TB, Plugs/Wires, Rotofab Oiled,+18% Lower, 2" Headers, Cat Delete, 93 Tune, Mobil 1, IPA FF04, 315/30/20 r888r, 664hp/693tq (93), 702hp/727tq (100 oct)

05-12-2018, 05:07 PM	#4
TheElementalCashew Drives: 2017 ZL1 Join Date: Mar 2017 Location: NH Posts: 278	2” Kooks here, no rubbing. __________________ 2017 Camaro ZL1, Nightfall Gray Metallic: M6, PDR, exposed CF, navigation, sunroof Mods: Rotofab CAI, Tony Mamo TB, Kooks headers (green cats), 18% LPE lower pulley, E85/FlexFuel sensor. BC Forged RS41s (19x10, 19x12)/PS4S, R888R (305/325) Dyno: E40: 661whp/703wtq, 93: 633whp/674wtq

05-13-2018, 11:55 AM	#10
mlee CamaroFans.com Drives: ZLE & ZR2 Join Date: Oct 2008 Location: Conroe, TX Posts: 37,501 View My Garage	Well known issue with Kooks and the LT4 __________________

05-12-2018, 05:11 PM	#5
danhr BAMF SS Drives: 2016 Camaro 1SS A8 Join Date: Mar 2010 Location: Ford City, PA Posts: 3,023	Looks like a solid reason to go to poly or solid motor mounts to me.

05-12-2018, 06:30 PM	#7
rjacobs Drives: none Join Date: Nov 2012 Location: Dallas, tX Posts: 248	I would "persuade" both the sheet metal and the header tube JUST a fraction each with a hammer. Im talking a tiny bit each. Let both have some love. You will lose zero power.

05-13-2018, 01:14 PM	#13
TDS Drives: 2019 Jeep Rubicon Sold:2017 ZL1 A10 Join Date: Feb 2017 Location: Scappoose, OR Posts: 560	I did know if you were talking about that or the frame __________________ Travis SOLD ZL1 Summit White, A10, Black Strip, PDR, ZL1 floor mats Ordered 2/11, 2000 2/14, 3000 2/20, 3100 2/24, 3300 3/7, 3400 3/8, 4300 3/16, 4B00 3/21 Bayed at train yard in Ohio, 4200 3/26 All Abroad for the West Coast, 4800 4/4 Deliverd to portland train yard, 5000 4/7 3:00AM Deliverd to Dealer, 6000 4/7 6:45PM Delivered to Customer

05-13-2018, 01:24 PM	#14
drfeelgood Drives: 2017 ZL1 Convertible A10 Join Date: Aug 2017 Location: San Gabriel, CA Posts: 992	thank for the info. This makes header choice a little clearer now. __________________ '17 White ZL1 A10 Convertible - TM ported TB - RotoFab CAI - 2.3" griptech upper pulley - Kooks 1 7/8" Headers with High Flow Cats - Borla S-type Catback - Audio Overhaul - NavTV M650-GM - 20" BlackDiForza- Michelin Pilot Sport4S - Tuned at BRC Raceworks (606rwhp/675trq) '14 CTS-V Coupe - ZL1 lid - Ported TB - Ported Snout - AirRad CAI - 8.66" lower - 2.55" upper- Greenbelt - SW Headers - SW Catback - Varimax Intercooler Pump - Track Attack Intercooler-Tuned at BRC Raceworks (551rwhp/516trq) '17 Maserati Levante- STOCK

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