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Old 11-16-2004, 12:03 PM   #1
criz
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Default installing TXS stealthback, any install tips?

I'm installing a TXS stealthback in my STi on thursday... anyone have any tips they've learned from previous installs that'll help?

i'm planning on modding the heat shield so I can have it on with the new DP.

can't wait to get this baby on!
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Old 11-16-2004, 12:14 PM   #2
TheMadScientist
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Do not try to seperate the stock DP and third cat. Take them out as one piece. That is about the only hang up some people run into. Otherwise it is straight foward.

TMS

BTW Unplug the O2 sensor and remove it from the cat after you get the exhaust off the car.
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Old 11-16-2004, 12:17 PM   #3
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Use anti-size on the threads of your nuts/bolts and the threads of your O2 sensor.
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Old 11-16-2004, 12:19 PM   #4
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do the mechanical fix.

make sure you have all the necessary gaskets (donut gasket comes to mind)!
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Old 11-16-2004, 12:28 PM   #5
criz
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mechanical fix?

thanks for the info guys
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Old 11-16-2004, 12:53 PM   #6
criz
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oh, and FYI, I have the hi-flow cat too
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Old 11-16-2004, 01:01 PM   #7
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nice thread, i've got the same exact setup that I will install this weekend.
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Old 11-16-2004, 01:32 PM   #8
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Quote:
Originally Posted by criz
mechanical fix?

thanks for the info guys
http://forums.nasioc.com/forums/show...hreadid=424666

PBBlaster is your friend too. It works much much better than WD40 to loosen stubborn rusted botls/nuts.
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Old 11-16-2004, 01:58 PM   #9
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that's the link. use the anti-fouler plugs...you can get those at kragen's. you will need to drill out the center of one of the plugs so that the O2 sensor will go through and mount to both extensions.

i haven't had a CEL ever with the mechanical fix...and it's simply an extension so you don't have to splice into your wires.
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Old 11-16-2004, 03:01 PM   #10
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another helpful hint:

the clocking of the flange between the rear exhaust pipe and the muffler pipe have to match up - so don't tighten the spring bolts between the rear exhaust pipe and hi-flow-cat until you have the bolts in that rearmost flange. If you tighten them early, you could very possibly have it slightly off in the clocking and then the flange holes won't line up very well.
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Old 11-16-2004, 03:15 PM   #11
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Quote:
Originally Posted by atc5
nice thread, i've got the same exact setup that I will install this weekend.

Haha cool, I'm installing the same set up too on my STi.

-Wes
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Old 11-16-2004, 03:29 PM   #12
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Quote:
Originally Posted by criz
mechanical fix?
although the link to the thread was provided, it's a long thread with lots of "alternate" and time consuming methods for achieving the same result. The short story is this:

Go to autoparts store and buy "Help!" brand spark plug anti-foulers. They look like threaded O2 bungs and come in a red package. You need one each of part number 42002 and 42009.

Take the one with the crush-washer on it (#2) and drill the center out with a 1/2" drill bit (clamp it in a vise and go at it - it's soft metal so the drilling is easy).

screw the #2 together with #1 and put them in between your rear O2 sensor and the bung on the cat. You'll never get the P0420 CEL after that.


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Old 11-16-2004, 04:04 PM   #13
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Default Check out this downpipe

Check out this downpipe MRT doesn't mess around....

www.Renickmotorsports.com under exhausts.
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Old 11-16-2004, 04:55 PM   #14
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nhluhr - THANKS for this, that's GREAT info...going to Kragen tonight.
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Old 11-17-2004, 02:29 PM   #15
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Definately do the mech. cel fix.
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Old 11-17-2004, 03:17 PM   #16
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do the cel fix eventhough I got the hi-flow cat?
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Old 11-17-2004, 03:33 PM   #17
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Quote:
Originally Posted by criz
do the cel fix eventhough I got the hi-flow cat?

^^ yes. do the fix.
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Old 11-17-2004, 04:10 PM   #18
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Quote:
Originally Posted by criz
do the cel fix eventhough I got the hi-flow cat?
I have not seen a single CEL and have had the stealth back for 8K miles.
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Old 11-17-2004, 04:52 PM   #19
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Quote:
Originally Posted by criz
do the cel fix eventhough I got the hi-flow cat?
run a search and if you comb through the threads, you will read that others with the hi-flow cat have had CELs pop up on them, even with the electrical fix.

i have a hi-flow cat as well and am using the mechanical fix...not one CEL yet.
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Old 11-18-2004, 03:53 AM   #20
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Also comprare prices of electronic (~$90) compared to mech. fix ($5-$6)
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Old 11-18-2004, 01:54 PM   #21
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I did the mechanical fix on my 04 wrx, close to 700 miles and no CEL yet.
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Old 11-18-2004, 02:06 PM   #22
TreeSki
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Quote:
Originally Posted by timmah
I did the mechanical fix on my 04 wrx, close to 700 miles and no CEL yet.
I also did the mech. fix on my '04...have about 4k miles since and no CELs to report. Mech fix is the way to go, and, for those that say it doesn't work on '04's (in other threads), they clearly did something wrong...

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Old 11-18-2004, 03:08 PM   #23
criz
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thanks for the info guys, it is going on tonight
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Old 11-18-2004, 03:54 PM   #24
nhluhr
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With the mechanical fix on my STI, i haven't had a CEL in over 10,000 miles... and I've gone catless for big chunks of that time. Previously, with the TurboXS (and Hi-Flow Cat), I was getting CEL's every few hundred miles.
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Old 11-18-2004, 04:10 PM   #25
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Quote:
Originally Posted by TreeSki
I also did the mech. fix on my '04...have about 4k miles since and no CELs to report. Mech fix is the way to go, and, for those that say it doesn't work on '04's (in other threads), they clearly did something wrong...


p.s. i'm catless as well
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