Megan Racing DOWNPIPE GS300?
I'm also looking for confirmation on the 3rd cat. California cars, i would bet, would have it if nothing else.
My SC, for example, has a cat in the "downpipe", just before the catback.
I'm putting a Megan GS pipe on, to eliminate the cat. But, if I can find a GS300 pipe with that little muffler on it, I would much rather put that on, since it is an OEM piece.
If anyone is in california, please chime in. The cat will not be round, but more oval shaped, with ribs in the bottom.
My SC, for example, has a cat in the "downpipe", just before the catback.
I'm putting a Megan GS pipe on, to eliminate the cat. But, if I can find a GS300 pipe with that little muffler on it, I would much rather put that on, since it is an OEM piece.
If anyone is in california, please chime in. The cat will not be round, but more oval shaped, with ribs in the bottom.
Last edited by DrLex; Mar 23, 2009 at 11:02 PM.
I am also in Cali, so I'm planning to run the VVTi twin cat header, with a header back setup.
The thing is you can't remove the primary header and remain legal. The stock header isn't that bad (the VVTi one). I was checking out an IS300 that dynoed over 200rwhp with a midpipe/exhaust upgrade, and OEM header.
The thing is you can't remove the primary header and remain legal. The stock header isn't that bad (the VVTi one). I was checking out an IS300 that dynoed over 200rwhp with a midpipe/exhaust upgrade, and OEM header.
Lexus Champion
Joined: Oct 2006
Posts: 2,175
Likes: 1
From: AFGI
Just for clarification it seems that the 98-99's have a muffler in this "third" location and the newer 2nd Gen's do have a cat there. I know that being underneath my 99 GS3 it certainly doesn't look anything like a cat, looks like a little muffler.
I landed on this page looking to get rid of that restriction point and it certainly looks like every "catted" front pipe is listed for 2000+ models.
Can anyone confirm that only the newer models have the third cat?
I landed on this page looking to get rid of that restriction point and it certainly looks like every "catted" front pipe is listed for 2000+ models.
Can anyone confirm that only the newer models have the third cat?
Driver School Candidate
Joined: Oct 2005
Posts: 3
Likes: 0
From: NC
well I have a 2000 and mine has a Cat on the downpipe. I will be eliminating it since it is now clogged. the result of it being clogged only allows my car a top speed of 32mph on a flat road due to the restricted air path. I hate Cat converters.
Driver
Joined: Jan 2010
Posts: 106
Likes: 1
From: OH
Do you think that a short section of pipe should cost $400?
Anyways, I think I'm going to pick one of these up. My heatshields are rattling and its starting to drive me crazy.
https://www.clublexus.com/forums/per...ld-for-gs.html
Driver
Joined: Jan 2010
Posts: 106
Likes: 1
From: OH
a vendor on here figs (aka mike) makes aftermarket heatshields and he's a great guy to work with, i have bought stuff from him and buying more soon
https://www.clublexus.com/forums/per...ld-for-gs.html
https://www.clublexus.com/forums/per...ld-for-gs.html
The ones that rattle like crazy on my gs are under the car, wrapped around the exhaust pipe.
Rookie
Joined: Feb 2009
Posts: 67
Likes: 1
From: DC/MD/VA/DE
I can definetely second this
I just had mine on a lift and it was confirmed by a shop that it is a cat on the end of the downpipe....so for the 2000+ GS300 owners what does the mean for the Megan Racing downpipe? O2 sim perhaps?
Yea but if it throws the code, it won't affect driveability at all. But for emission purposes or if the CEL bugs you, you can easily o2 sim it and get rid of it. I would advise getting rid of it anyway even though it does not affect anything b/c if you get other codes for whatever reason, there is no way of telling.
Driver School Candidate
Joined: Jun 2015
Posts: 6
Likes: 0
From: Ny
Megan Header Plas Header
MR makes very good products at great prices !and no i dont work for megan racing ! just speaking from experience from selling and installing their products over the past 3 years. the main purpose of an aftermarket exhaust is to have more free flowing burnt gas to exit out as fast as possible ! rule of thumb the faster you can get air in and out of an engine the more hp you'll make ! id say buy it !
