Since installing my Labree test pipes, I threw an SES after about 50 miles. I didn't do the non-fouler trick at first because I thought there was a chance I wouldn't see the light (I have an '04, turns out it must be an '04.5 since I threw the SES). Went down to Pep Boys, spent 8 bucks on the two sets of non-foulers, spent about 15 minutes installing them. There were two sets you could buy, I think the Z takes the 18mm (the guy at the parts desk actually went and got a 350Z O2 sensor to see which size was correct).

Here are the pics of everything. Even though there are alot of threads about this already, I made one because none seem to have pics, and hopefully this thread will clear up any questions for future instals.

First off, for those who don't know, you need to buy TWO pairs of the non-foulers. One pair needs to be drilled out with a 1/2" drill bit (Most drills can't hold this bit, look at the pics of the drill I used... its over 30 years old). Once one set is drilled out, you take a drilled non-fouler and screw it onto the O2 sensor. Then take the NON-drilled one and screw it onto the DRILLED one. So the order goes, O2 sensor-->Drilled-->Non-drilled-->test pipe/cat. Once you go to do the drilling and everything, the order makes sense.

 

more pics

 

and more..

 

You do NOT want to use these on your upstream sensors (the ones in your headers)

 

Exactly what I did with my system yesterday..

 

 

how do you get the O2 sensor to stay in is when you drill the non fouler, it is not threaded?? what did you use??

 

buy a set of nonfoulers and look at them, it will become more than obvious how this is done

 

can someone tell me what the gain in h.p. is with stock exhaust and test pipes????????????????

 

Horsepower gains? To the wheels its probly a little higher than 5. The thing is, you'll lose low end torque and gain high end power.

 

Anyone still selling these pre-made? I might be buying a set of Labree TP's and an Nismo exhaust so if I can get them before I go through with the purchase, that would be great.

PM w/ price if you do this.


Also, another question. If you do this non-fouler workaround, if your local DMV does ECU tests to check emissions as opposed to a sniffer, will this help you pass or should you have a set of stock cats sitting around for the test?

 

For FI test pipes - about 8-12 HP...depends on where you live, sea level, time of year, tuned or not...Rick

 

The low end TQ loss, per our dyno's and tests for the FI resonated testpipes, is at 2100-2250RPM - a whole 150RPM of losspoint....so basically no loss at all.

Check out the stats at www.fastintentions.com

Rick

 

and this prevents the O2sensor from throwing a code?.....can this be done if you have the Turbonetics single?

 

I have a 2005 G35 Sedan 5AT with Crawford cats, JWT Pop Charger and Z-Tube, and an Altered Atmosphere plenum spacer. I started getting the SES light before I installed the plenum spacer. I can't help but think it's the Cats since I had so much trouble with them in the first place.

If I can get the code, will that tell me which O2 sensor is pissed off?

 

Don't know if it will work...but for $10 what's there to loose really..

 

Quick highjack: What exactly are the benefits of testpipes?

 

Yes it will should 100%

 

A more freely flowing exhaust = more power an more sound.

 

I put non resonated TPs on my Z yesterday. I have to say it was a really bad idea cause now I'm all paranoid about cops smelling the stink of my car. Now all I can think about is getting rid of these for some HFCs. IMO TPs are not worth the meagre gains.