Doug Thorley Y-pipe on your FJ in California? - Page 2 - Toyota FJ Cruiser Forum
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post #11 of 20 (permalink) Old 07-03-2018, 03:41 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

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I have a used set taking up space between my manifolds and muffler. Rattles a little bit like my last set did. Thinking about swapping to URD Y pipe and BA muffler/resonator to drown out the URD rasp. Would also open up area to install an Atlas...
If u swap, go the URD U spec exhaust (equal lenght y pipe & cat back) that's what I'm currently running with the Magnuson Supercharger.

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post #12 of 20 (permalink) Old 07-03-2018, 03:42 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

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He replied to me on brown room. I wonder if he has a used set taking up space :
Just got back to you on brown room


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post #13 of 20 (permalink) Old 07-04-2018, 07:48 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

As I am sure you know, in California if it doesn't have a CARB sticker its illegal.
The smog stations are getting picky now days cause they don't want to fined or lose the license.
I think once a station sees the illegal device it gets noted and no matter where you go, it can not be passed. Just a heads up.


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post #14 of 20 (permalink) Old 07-04-2018, 07:58 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

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As I am sure you know, in California if it doesn't have a CARB sticker its illegal.
The smog stations are getting picky now days cause they don't want to fined or lose the license.
I think once a station sees the illegal device it gets noted and no matter where you go, it can not be passed. Just a heads up.
Yeah I passed smog with them. The resonators look as the secondary cats thus passes visual. As for throwing any code or diff reading once hooked up to the obd port. The scanner reads everything as it would be with the factory y pipe. This has also been tested to be true when doing tunning with Magnuson Superchargers. Factory O2 sensors still get used in the same location as on the OEM y pipe. But that's correct it doesn't have a CARB number.

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post #15 of 20 (permalink) Old 07-04-2018, 08:24 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

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...Thinking about swapping to URD Y pipe and BA muffler/resonator to drown out the URD rasp.
Can you clarify what you're referring to here? I've got URD MT parts and am getting a "chirping noise" from the replacement throw-out bearding assembly I bought with the Stage II clutch assembly...
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post #16 of 20 (permalink) Old 07-04-2018, 09:38 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

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Can you clarify what you're referring to here? I've got URD MT parts and am getting a "chirping noise" from the replacement throw-out bearding assembly I bought with the Stage II clutch assembly...
I'm just talking exhaust. The URD offroad Y pipe removes the factory cats and replaces them with straight pipe. This will create quite the raspy noise with our V6's. (V8's still sounds alright) The full URD exhaust setup usually includes an additional resonator in the tailpipe to stop the rasp sound.

The Doug Thorley Y pipe also removes the cats but replaces them with resonators.
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post #17 of 20 (permalink) Old 07-09-2019, 02:49 AM Thread Starter
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Re: Doug Thorley Y-pipe on your FJ in California?

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I'm just talking exhaust. The URD offroad Y pipe removes the factory cats and replaces them with straight pipe. This will create quite the raspy noise with our V6's.
Finally installed mine. The DT has a slight roar/ rasp on acceleration. Can an exhaust leak be confused as raspy-ness?
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post #18 of 20 (permalink) Old 07-09-2019, 03:11 AM
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Re: Doug Thorley Y-pipe on your FJ in California?

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Finally installed mine. The DT has a slight roar/ rasp on acceleration. Can an exhaust leak be confused as raspy-ness?
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post #19 of 20 (permalink) Old 07-09-2019, 04:31 PM
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Re: Doug Thorley Y-pipe on your FJ in California?

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jamesepoop previously said: View Post
Finally installed mine. The DT has a slight roar/ rasp on acceleration. Can an exhaust leak be confused as raspy-ness?
I always thought an exhaust leak sounds similar to a cylinder is missing. With the DT Y pipe I noticed the exhaust gets a little more "untamed" louder and raspy. Not much but slightly noticeable.
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post #20 of 20 (permalink) Old 07-10-2019, 02:34 AM Thread Starter
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Re: Doug Thorley Y-pipe on your FJ in California?

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Iconic_ previously said: View Post
Not much but slightly noticeable.
Good to know. I'm going to check my AFE exhaust. The slip fit might be off and causing some leaking.

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