Originally Posted by flowrider

^^^^Not necessarily. It will pass visual, and should pass the sniffer with the secondaries still installed. With the installation of an o2 conditioner, such as the one sold by PPE, you will not show a CEL. IMO, you will pass.

Lou

Originally Posted by flowrider

^^^^Maybe, but 2010ISF, is only taking about gutting the primary cats. The o2 conditioner is pretty much a stealth part. Again, nothing, IMO, will appear to not be stock.

BTW, I spent 22 years in Santa Barbara.

Lou

Originally Posted by lobuxracer

If you want to impress your friends with dyno charts, knock yourself out. I don't care about dyno charts. When two cars of similar manufacture run side by side and neither walks away, it says a lot about the evenness of the match up. Weather/altitude is not a factor. The size of the fan blowing into the front of the engine isn't a factor. The methodology of loading the engine isn't a factor. The hood being open or closed isn't a factor. In fact, I couldn't care less what my car shows on a dyno. I only care about it being faster than before I spent any money. Witness the K&N intake dyno which no one has translated into a quicker/faster time slip. If the engine makes similar power with gutted cats as it does with headers (of any manufacture), then the header design is inconsequential and the Lexus design is far better than many give it credit for being.

I already know all the theory. I know primary size and length numbers, I know 4 - 2 - 1 is a better header for a lot of reasons, I know collector construction means a great deal to flow numbers, and I know Burns Stainless provides some of the best stuff in the industry. It's handy to know stuff.

I also know everything I thought I knew about porting went out the window when I learned fundamental gas behavior, and even more went out the window after looking at what some of the real pioneers are doing. So, I'm not at all convinced the car isn't competitively fast with just gutted cats.

Originally Posted by Sylvan

I agree by gutting the cats everything looks OEM. You would never know anything was done to the exhaust at all and the sim is wired in and mine is hidden. Even if they found it in no way would they know it was emissions related it looks more like a resistor for lighting which is what I would tell them in the unlikely event they discovered it and I mean highly unlikely.

Originally Posted by 2010ISF

How does your car sound with the gutted primaries, does the sound compare to having headers? I'd probably pair it up with an exhaust like you did

Originally Posted by Sylvan

It's fairly loud, I have the ISS Forged QES that also has the resignatiors removed. I have only seen two header cars in person one had an HKS exhaust if I recall right (4everkidd is the member on here) his was similar volume to mine and the other guy had straight pipes from the header back and was about 2x as loud as mine . If you want to PM you cell number I could send you a couple videos I have taken.

Originally Posted by CBR169

When the ISF triggers a cel for no cats beside it staying in 2nd gear off the start does it hurt the performance also? just got one of your conditioner's today and will be installing it shortly (Curtis Asian Imports btw) we spoke last week

Originally Posted by juanmedina

Is the O2 conditioner easy to install? I deleted my secondary cats and mufflers and I am thinking about gutting the primary cats. I think I will have to add high flow cat because I don't want to deal with any smell. Any recommendations on a high flow cat?

Originally Posted by RRRacing

When you get a CEL on the ISF, it also disables your traction control and stability. I have no idea why they do this. I guess they want you to die if you get an 02 sensor CEL



I have experimented with various cats. You can get Magnaflow cats through our site, they are relatively inexpensive, and they work will for street applications. The Magnaflow cats are metal cats, and are not OBDII compliant.

We can also get "BEGI" OBDII cats, but they are more costly. The main advantage of the BEGI cats is that they are much more durable. I recommend if you track your car, get the BEGI cats. We eventually blew out the metal cats from the sustained high exhaust temperatures at the track. They didn't break apart, but they simply stopped working.

Rafi

Originally Posted by juanmedina

Are you talking about the kit that you guys are selling for 300? the two cats and the conditioners?
Do you have instructions on how to install the conditioners? how easy is the install?

Also Rafi did you use to work for Full-Race? I think I remember you from NASIOC

Thanks

Juan

Originally Posted by pharnhyte

I did this mod, I wish I didn't. I can no longer open the sunroof, or just one window because all I smell is the exhaust. It's embarrassing, my passengers even smell it and comment on it, so it's not me being sensitive. The only way to avoid the smell is by opening, well cracking 3-4 windows at once. You can't open just one window, or just the sunroof. Depressing.


At any rate, coupled to the Borla exhaust,it sounds intoxicating, it's just the smell is as well. I have the 4 mkiv supra's right now at my house, and not one has catalytic converter's, and not one smells at all, so I guess I didn't expect it from the Lexus, I figured everyone was exaggerating. I'll probably weld cats in, or get PPE headers with cats.

Steve

Originally Posted by RRRacing

Hey Juan, nope I never worked for full-race. I have done hundreds of WRX/STi's tunes though...

We have full step-by-step instructions with illustration how to install the conditioners, its only about 4 wires that you have to tap or splice into.




Hi Steve, I think you have some exhaust leaks, particularly at the header/exhaust flange. You should not smell anything in the car, especially while driving. I would replace the two gaskets at the header flange. They deteriorate, and need to be replaced from time to time expecially if you remove the exhaust.

Rafi