Thank you. As for the turbo manifold... not sure yet. I don't want to say anything else for the sake of this thread and/or my post being deleted.

 

Awesome DIY!!!!

 

Wheres the DYNO??

 

Just install my headers like 3 weeks ago and my CEL just came on. my ? is, can i just replace the O2 sensors to turn off the CEL and will is stay off? do i really need the O2 sim?
Thanx

 

The light is on because the lower 2 sensors are reading that your cats are not working correctly. In reality the cats are missing completely. You will need the O2sim to trick the ECU into thinking the rear O2s are getting a good signal which makes it think the cats are there and working just fine.

 

Oh i c thanx alot

 

so do the headers make a big difference? power/torque wise at least?

 

Which O2 Simulator's wiring is OK for '01 GS300 ?
There is so much information about different models. Is it possible to clarify the situation for each year model ?

Thanks a lot for your help.

Denis.

 

Has anyone that has installed a header actually answered this question?

What is the gain?

How much noise does it increase with a stock y-pipe and/or cat-back exhaust?

Is a header CARB approved for street use?

 

I have a LMS cold air intake and a header on my 01 GS3 and the car is definitely waaaaaaaaaaaaaay more responsive off the line. The rest of the exhaust is stock. I have a NEO that is gonna be installed, then I will get it dynoed. The car is very quiet, just like stock, but when you romp on the throttle, people's heads turn! Headers are not legal in any state, I don't believe.

 

Hi,

Where can I get this DIY Headers from and did you feel the perfomance gain and tell me if it so complecated to fix it or not and one more thing, didnt you suffer from any leakage???

Thanks

 

Ever any definitive answer on noise/power gains with the OBX headers?

 

The OBX headers are sold as headers for the is300 but they still fit right?

 

Yep, if you decide to use the OBX y-pipe, you will have to have that extended. Otherwise, the header itself fits.

 

thanks and this is the best header there is i take it? also wheres the best place to buy one