I'm going to guess that the back orders will get the 304, as the tool in current production broke.

I'm also going to say, wow, that's a really good deal, i don't know many companies that upgrade their materials for free, this is an excellent upgrade

 

Correct. All the back orders will be polished stainless 304.

 

^ Woot! guess the "best" things in life really are worth waiting for huh?

 

Tony - I have read that the rear O2 sensors have functionality with long term fuel trim for Stoichiometric targeting. With the sensor bung design it moves this out of the stream of the exhaust so no CEL but I have noticed since installing the ARTs that my fuel mileage went down - mostly on freeway driving. Are you aware of this?

 

Now you make me want to go check the manual for context.
However, the key parts there are the swtched mode at the start, and the normal conditions part at the end.

I did not see any change after fitting ART pipes, including cruise. Did you reset your ECU? And check its not leaking after fitting?

 

The exact same is happening to mine. If you use Cipher to watch the AFRs, you can see how they fluctuate erratically. The cel on mine will only come on now if I stomp on the gas. Before when I had HFCs, the cell would always come on and the AFRs fluctuated alot more. So the ARTs are better but they're not perfect. My highway mpg stock was 26.5 and with the HFC it went down to 22. I haven't had a chance to measure it with the ARTs but I can tell it's a little better. I'm getting a few more miles out of a tank of gas now.

Also I've noticed alot of people with 05s and up have this problem, so maybe the 03-04s were programmed differently.

 

No but many times a power mod is actually more efficient. I even measured a 2%-3% increase in fuel efficiency in ART pipe development.
Another thing that often happens is people will use the extra power provided by a modification which will use more gas in the process.

Also, one thing you can do is dyno test to see where your A/F ratio is. If you find it is running rich its easy to fix with a tune.

 

I understand the 05's and up have a differing manifold that flows/connects to the cats or ART in a different way to the 03 and 04.

Stock gasket is ok on the early ones, but i believe that you need to use no gasket and just high temp gasket sealant for the 05 on.


What you're describing is the introduction of air into the system, usually by a leak between the manifold and the cat/HFC/ART pipe. Check the seal, you shouldn't get this condition ideally.

 

That is the HR engine you are referring to for the RTV.

The 05 is the DE series engine uses the stock metal gasket.

 

Oops, my mistake.

However, i'd still check for leaks in the connections on the exhaust as it can cause what was described.

 

^that too.

 

Kinda off topic Tony, but any chance for the MREV3?

 

No. Sorry, no MREV3.

 

^phew, I've only had my MREV2 for a month

 

Haha, well good for those who already have it. I think that's almost last on my list, i already have the spacer and i'm on a DE. It'll still give me more power right where i want it, but the Shockwave is next