Kooks headers and midpipe

Discussion on fuel delivery & intake/exhaust tech & mods.
Hzgray
Posts: 90
Joined: Fri Sep 09, 2016 8:04 pm
Location: Old Dominion

Kooks headers and midpipe

Post by Hzgray »

So, I was reading the instructions and Kooks says to not reinstall the cross brace as it is only used to hang the exhaust at the factory. Sound right? Also, I've been told that there is enough slack for the O2 sensor on the drivers side. Apparently there is extra taped up behind the head within the loom. Sound right? I hope to start on this tomorrow with jack stands. Thanks.
2013 9C3, DoD delete, BTR Stg 1, Kooks 1 7/8, Rotofab, 3.27 Diff, VMR 810 wheels (staggered), King Springs (lowered), oh and a D1SC.
Silversled
Posts: 270
Joined: Fri Aug 12, 2016 7:13 am
Location: Tampa, FL

Re: Kooks headers and midpipe

Post by Silversled »

I re-installed my "plate" with 3/8" spacers. My Kooks thread is on here somewhere. The plate comes in handy when you have to remove the headers without dropping the whole mid-pipe as it was recently when I did the DOD/CAM mod.

Yes I was able to plug the primary O2 sensor in on the driver's side without an extension. The passenger side needed an extension in my case.
2014 Chevrolet Caprice PPV
2014 Chevrolet Stingray Z51
2016 AMG C63
2015 BMW X5 iDrive 50i
Hzgray
Posts: 90
Joined: Fri Sep 09, 2016 8:04 pm
Location: Old Dominion

Re: Kooks headers and midpipe

Post by Hzgray »

Thanks. Seems like the o2 sensor extensions vary.
2013 9C3, DoD delete, BTR Stg 1, Kooks 1 7/8, Rotofab, 3.27 Diff, VMR 810 wheels (staggered), King Springs (lowered), oh and a D1SC.
s/c'd cav
Posts: 1382
Joined: Mon May 30, 2016 3:12 am
Location: PHOENIX AZ

Re: Kooks headers and midpipe

Post by s/c'd cav »

if you push up the exhaust before tightening it up , then heat cycle the car a couple times , and readjust it it should stay clear of the brace with no spacers or leaving it out

just most people never take those steps
Hzgray
Posts: 90
Joined: Fri Sep 09, 2016 8:04 pm
Location: Old Dominion

Re: Kooks headers and midpipe

Post by Hzgray »

Thanks
2013 9C3, DoD delete, BTR Stg 1, Kooks 1 7/8, Rotofab, 3.27 Diff, VMR 810 wheels (staggered), King Springs (lowered), oh and a D1SC.
User avatar
kevink
Posts: 480
Joined: Sun Aug 09, 2015 12:55 pm

Re: Kooks headers and midpipe

Post by kevink »

Hzgray wrote:So, I was reading the instructions and Kooks says to not reinstall the cross brace as it is only used to hang the exhaust at the factory. Sound right?
No way. It's a structural piece. There's a color-coded drawing of the structural components of the chassis somewhere, which I can't find right now, that it's shown on.

The Kooks system must be pretty poorly designed if it comes anywhere close to the brace. I have all of this 3" stuff shoved up in my tunnel, which is huge, and nothing comes close to hitting the driveshaft, tunnel, or the brace.

Image

I have Kooks full length headers and I needed an O2 extension on the driver's side only. It's pretty weird how some people need an extension on the passenger side. The driver's side harness is bolted to the rear of the cylinder head. If you unbolt it, you may be able to get the additional length you need, but that might cause other problems... not sure. Mine was only an inch or two away from connecting.
2011 9C3: 11.48 @118.
User avatar
kevink
Posts: 480
Joined: Sun Aug 09, 2015 12:55 pm

Re: Kooks headers and midpipe

Post by kevink »

2011 9C3: 11.48 @118.
jackleg
Posts: 99
Joined: Wed May 04, 2016 9:25 pm
Location: SW MI

Re: Kooks headers and midpipe

Post by jackleg »

Mine was able to be pushed up then tightened down to clear the brace.

Be careful tugging on your harness to plug in the driver side oxygen sensor. You may find yourself soldering a new eyelet on the ground wire that got broke off the rear of the driver cylinder head (in a very tight place) and still needing to go out and buy the oxygen sensor extension
2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune
Hzgray
Posts: 90
Joined: Fri Sep 09, 2016 8:04 pm
Location: Old Dominion

Re: Kooks headers and midpipe

Post by Hzgray »

Thanks. I think I managed to get enough length without breaking the ground wire. We'll see for sure tomorrow! Appreciate the structural info. Kooks instructions say to not reinstall the brace but I will.
2013 9C3, DoD delete, BTR Stg 1, Kooks 1 7/8, Rotofab, 3.27 Diff, VMR 810 wheels (staggered), King Springs (lowered), oh and a D1SC.
s/c'd cav
Posts: 1382
Joined: Mon May 30, 2016 3:12 am
Location: PHOENIX AZ

Re: Kooks headers and midpipe

Post by s/c'd cav »

like i said use a jack or something to push the exhaust up in the brace area , up as high as you can , then tighten it the whole exhaust from header connection to the mufflers

then you can let the exhaust hang down , and you will notice it does drop some

which is why after a few heat cycles you readjust it and tighten it up , do that for a week or two and it should stay put
Post Reply