installing Kook's mid headers - Pontiac G8 Forum: G8 Forums - G8Board.com
Exhaust Tech Headers, Catbacks, Mufflers, lack of mufflers

 
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post #1 of 4 (permalink) Old 06-20-2016, 08:30 PM Thread Starter
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installing Kook's mid headers

I will be installing the kooks mid headers on my G8 Gt have two questions really.
1) since I am installing the cats also will I trip the CEL for the rear O2 sensor. I cant seem to find a definite answer on this.
2) Will I need set of filtered extenders for the rear O2 sensors per the thread on
https://www.g8board.com/forums/116-ex...ooks-mids.html
Thanks
Tony
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post #2 of 4 (permalink) Old 06-20-2016, 09:59 PM
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Yes, you'll eventually trip the CEL if you don't tune it out. The filtered extenders will delay it though

SRM GXP 6M
RotoFab intake, Kooks mids, Solo Axle-Backs
Patrick G tuned to the note of 419whp / 416tq
VMR710FF 19x9.5 all around.
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Gone- 2009 MGM GT
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post #3 of 4 (permalink) Old 06-20-2016, 10:50 PM
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Didn't need o2 extenders and I did retune asap.

My guy got me rolling in under 2 hrs and he had to torch the rusty bolts on the cats to boot. I never did it myself and watched my mechanic do the whole process. It seemed pretty easy. Of course its easier to do it on a lift.

Good luck and happy modding!

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KOOKS 1 7/8 mids and HFC's (coated)

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post #4 of 4 (permalink) Old 06-21-2016, 09:35 AM Thread Starter
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Well I ordered the parts for the extenders I cant turn off the O2 sensors with my flashpaq so this will have to do for now. I guess I will have to look at getting a custom tune in the future.
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