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Oct 23, 2005 | 06:42 PM

Iam2bewit

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From: baton rouge

header question

tryin to install flowtech headers on 99 trans am. I dont see enough holes for the o2 senors, do i leave off the top two, or what? not planning on runnin the cats, so what do i do? and if someone knows where to find help installin these, let me know

Oct 23, 2005 | 07:22 PM

2K2WS6TA

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From: Ark City KS

You leave the rear O2 sensors off, and either run O2 sims, or have them tuned out. The front O2s are required for the engine to run properly
Link to set for sale
https://ls1tech.com/forums/lsx-parts-sale/399219-02-simms.html

Last edited by 2K2WS6TA; Oct 23, 2005 at 07:39 PM.

Oct 23, 2005 | 07:51 PM

Iam2bewit

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From: baton rouge

can i run the car with those left out until I can get tuning,and without the sims?

Oct 23, 2005 | 08:14 PM

2K2WS6TA

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From: Ark City KS

Yes you can run it without the rear O2s, you'll get an SES light, but the performance won't be optimal, it may feel sluggish down low, or you may have no adverse effects.

Oct 23, 2005 | 10:31 PM

REDWS6ROCKET

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From: Blue Springs, MO

will not affect performance at all. rear 02 sensors just moniter the cats and to make sure they are doing there jobs. your ok just make sure the fronts are hooked up