CARB legit exhaust setup

IMO, the second "Y" at the rear is restrictive. Take a peak at it, there's a crush where it splits and goes to the mufflers. Personally, I don't think the mufflers are a problem, and I like the sound. If you want to keep the secondary cats, why not build a real dual system that starts after the secondaries, and if you want more noise, leave off the resonators and replace the mufflers.

I wanted a dual system when I got my F, and I removed the secondary cats, but kept the stock mufflers. I did my exhaust mod when I had 100 miles on the car. I now have 7K miles, and am very happy with what I did. A thread outlining my changes is attached.

http://www.lexusf.com/forums/showthread.php?t=890

Lou

Thks

Thanks man; great idea. Gonna look into it. My motorhead son is pushing me to mod my car!

^^^^With respect to Lou You're killin' me here As I said, I'm still quite pleased with what I did. If I were to do it today, I wouldn't change a thing. I do, however, have a Real Genuine Joe Z Intake

But, Joe, you're right, I should have mentioned all the other options that have come on the market since I did this. Sorry. Stretch, do a search you'll find all sorts of options, both here and at Club Lexus.

Lou

lowrider said:

^^^^With respect to Lou You're killin' me here As I said, I'm still quite pleased with what I did. If I were to do it today, I wouldn't change a thing. I do, however, have a Real Genuine Joe Z Intake

But, Joe, you're right, I should have mentioned all the other options that have come on the market since I did this. Sorry. Stretch, do a search you'll find all sorts of options, both here and at Club Lexus.

Lou

Click to expand...

I guess I should have said “No disrespect to Lou"..

Here in Cali, falling back on the OEM exhaust is very important...!!
Especially, in the event of a severe exhaust violation, where you can be sent to a SMOG Referee for a FULL examination of ALL exhaust components..

I still applaud you for one of the first F owners to mod their exhaust...

Joe Z

I can't help you with the exhaust but.... Can you send me a high res of the underside of the car without your annotations? Cool pic.

lowrider said:

IMO, the second "Y" at the rear is restrictive. Take a peak at it, there's a crush where it splits and goes to the mufflers. Personally, I don't think the mufflers are a problem, and I like the sound. If you want to keep the secondary cats, why not build a real dual system that starts after the secondaries, and if you want more noise, leave off the resonators and replace the mufflers.
Lou

Click to expand...

This is a good idea. I'd like to make mine a real dual system but still keep it legal and as loud as it currently is. I just can't find one that has been produced. I might just have it customized by an exhaust shop as well. Thanks.

That is the underside of an IS350 is it not? Does modding a stock system make it CARB legal? I am not clear on the latest Cali inspection standards?
Any yes, that Y is restrictive. I just finished up my exhaust this weekend and put it on the car. I am very happy with gains so far and of course the sound