New Kooks Street "Sleeper" 2.5" Stainless Catback - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MarylandSpeed · 10-13-2010, 02:04 AM

We have had some request for a quieter system than the current Kooks 3" system. In working with Kooks, we found the 3" system is loud, and on occasion can drone because the large 3" pipes create a low pressure area in the center of the exhausts. In simple terms, this allows the sound waves more room to bouce around and vibrate in the exhaust, which creates more sound, and in some cases drone.

Earlier this month, Kooks sent us a 2.5" version of this catback to test. In testing this, we did it in a "worst case" scenario. An automatic car always drones before an M6, so we chose to install it on my wifes L99 SS. To make the task even harder for the exhaust, we added high flow cats to the car. The cats add sound, and can induce drone with other exhausts. To round it out, we left the car otherwise bone stock with AFM still active.

The exhaust itself is all CNC bent, TIG welded, 304 stainless steel. It comes with Kooks straight through oval mufflers, and 4" double wall tips. It will connect to your stock mid pipes, or any aftermarket mid pipes/headers that retain the stock barrel clamps under the seats.

The videos and pictures below tell the rest of the story. Basically, this exhaust is awesome. It has a great deep rumble, but as the video shows, does not drone. Especially listen towards the end where the car is floored. It goes from being a complete beast under full throttle to so quiet at cruising you can hear only wind noise. Keep any eye out in the sponsor forums for an upcoming introductory sale on these!

Think the stock L99 center muffler creates some friction and restriction?

mikeSS · 10-13-2010, 02:35 AM

cool

Andro · 10-13-2010, 08:21 AM

I love my Kook's 3" exhaust

caverman · 10-13-2010, 09:07 AM

NICE!

I have a feeling you are going to sell a bunch of those.

c-dub · 10-13-2010, 09:51 AM

very cool

1Camaro2SS · 10-13-2010, 11:04 AM

Do you think the 1 7/8 kooks headers with high flow cats would sound good with my 2.5" borla sport catback? Wish I can hear this setup on an L99.

caverman · 10-13-2010, 12:02 PM

Quote:

Originally Posted by 1Camaro2SS

Do you think the 1 7/8 kooks headers with high flow cats would sound good with my 2.5" borla sport catback? Wish I can hear this setup on an L99.

A little off topic.....we are talking KOOKS cat-back here, not Borla.

There are plenty of threads about LT and Borla cat-backs....just do a search.

Tantalizer43 · 10-13-2010, 01:12 PM

Video seems nice!

Could you possibly post a pic or 2 that shows how the tips look coming out of the rear valance? From the video they look pretty good, don't seem to stick out as much as some aftermarket exhausts...

BLACK10 · 10-13-2010, 01:18 PM

thats a good looking exhaust. i love my kooks headers

MarylandSpeed · 10-15-2010, 09:10 PM

Quote:

Originally Posted by Tantalizer43

Video seems nice!

Could you possibly post a pic or 2 that shows how the tips look coming out of the rear valance? From the video they look pretty good, don't seem to stick out as much as some aftermarket exhausts...

Will work on getting them this weekend

ITGuy11 · 10-15-2010, 09:55 PM

I wish you had this a couple of months ago!

omegaman · 10-15-2010, 11:30 PM

Very interested. Presently have Kooks 1 7/8 LT with high flow cats into stock exhaust.

Marylandspeed is excellent for those of you considering a purchase. The best prices.

Tantalizer43 · 10-23-2010, 11:41 AM

Any more word on this exhaust??

10-13-2010, 02:04 AM	#1
MarylandSpeed Account Suspended Drives: 2012 ZL1 & 2010 2SS/RS Join Date: Jul 2009 Location: Maryland Posts: 3,378	New Kooks Street "Sleeper" 2.5" Stainless Catback We have had some request for a quieter system than the current Kooks 3" system. In working with Kooks, we found the 3" system is loud, and on occasion can drone because the large 3" pipes create a low pressure area in the center of the exhausts. In simple terms, this allows the sound waves more room to bouce around and vibrate in the exhaust, which creates more sound, and in some cases drone. Earlier this month, Kooks sent us a 2.5" version of this catback to test. In testing this, we did it in a "worst case" scenario. An automatic car always drones before an M6, so we chose to install it on my wifes L99 SS. To make the task even harder for the exhaust, we added high flow cats to the car. The cats add sound, and can induce drone with other exhausts. To round it out, we left the car otherwise bone stock with AFM still active. The exhaust itself is all CNC bent, TIG welded, 304 stainless steel. It comes with Kooks straight through oval mufflers, and 4" double wall tips. It will connect to your stock mid pipes, or any aftermarket mid pipes/headers that retain the stock barrel clamps under the seats. The videos and pictures below tell the rest of the story. Basically, this exhaust is awesome. It has a great deep rumble, but as the video shows, does not drone. Especially listen towards the end where the car is floored. It goes from being a complete beast under full throttle to so quiet at cruising you can hear only wind noise. Keep any eye out in the sponsor forums for an upcoming introductory sale on these! Think the stock L99 center muffler creates some friction and restriction?

10-13-2010, 08:21 AM	#3
Andro NOICE!!! ™ Drives: Force Fed 427 Join Date: Jan 2009 Location: GOT BOOST? Posts: 5,213 View My Garage	I love my Kook's 3" exhaust __________________

10-13-2010, 09:07 AM	#4
caverman Drives: '69 SS Convertible Join Date: May 2009 Location: DFW, TX Posts: 7,111	NICE! I have a feeling you are going to sell a bunch of those. __________________ *-2010 Camaro* 2SS \| M6 \| VR w/White Stripes \| 1 3/4" KOOKS - 3" Magnaflow \| LPE 3.91 gears \| ADM tuned \| Halltech w/ADM Scoop \| Spohn/BMR Trailing Arm/Toe Rod \| BC Coilovers\| Pedders FE4 ZL1 swaybars \| Cradle/Diff/Radius Rod bushings \| VMax TB \| Morimoto Projectors \| MGW shifter \| Red Calipers Build Journal

10-13-2010, 09:51 AM	#5
c-dub It's that guy Drives: 2011 SIM SS/RS Join Date: Sep 2010 Location: Hopewell VA Posts: 673 View My Garage	very cool __________________ We mortals are but shadows and dust.

10-13-2010, 11:04 AM	#6
1Camaro2SS Drives: 2013 Camaro ZL1 M6 Join Date: Sep 2010 Location: Grand Rapids, MI Posts: 1,445 View My Garage	Do you think the 1 7/8 kooks headers with high flow cats would sound good with my 2.5" borla sport catback? Wish I can hear this setup on an L99. __________________

10-13-2010, 02:35 AM	#2
mikeSS Drives: 2015 c7 Join Date: Nov 2009 Location: MI Posts: 7,462	cool

10-13-2010, 01:12 PM	#8
Tantalizer43 Drives: 2010 Camaro SS/RS Join Date: Aug 2008 Location: Cincinnati OH Posts: 1,359	Video seems nice! Could you possibly post a pic or 2 that shows how the tips look coming out of the rear valance? From the video they look pretty good, don't seem to stick out as much as some aftermarket exhausts... __________________ Last edited by Tantalizer43; 10-13-2010 at 01:23 PM.

10-13-2010, 01:18 PM	#9
BLACK10 Drives: 2010 CAMARO. 10.04@133mph, 1.4 60' Join Date: Jul 2009 Location: Lafayette, Louisiana Posts: 4,585	thats a good looking exhaust. i love my kooks headers

10-15-2010, 09:55 PM	#11
ITGuy11 Burning up tires Drives: 2023 ZL1 Vert Join Date: Jul 2010 Location: Macomb Twp, MI Posts: 717	I wish you had this a couple of months ago!

10-15-2010, 11:30 PM	#12
omegaman Drives: very poorly Join Date: May 2009 Location: Glendale, Arizona Posts: 550	Very interested. Presently have Kooks 1 7/8 LT with high flow cats into stock exhaust. Marylandspeed is excellent for those of you considering a purchase. The best prices. __________________ 2013 Camaro ZL1, Crystal Red, Auto, Exposed Carbon Fiber, Navigation.

10-23-2010, 11:41 AM	#13
Tantalizer43 Drives: 2010 Camaro SS/RS Join Date: Aug 2008 Location: Cincinnati OH Posts: 1,359	Any more word on this exhaust?? __________________

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