Author Topic: 3RZ Exhaust with Doug Thorley Shorty Header  (Read 421 times)

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  • Offline Dusty Trails
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3RZ Exhaust with Doug Thorley Shorty Header
« on: Sep 18, 2019, 12:46:46 PM »
I have struggled to find the specific information I am looking for thus far, so I am giving this a shot.  Hopefully this hasn't already been covered a million times.  But if it has, feel free to give me the bird, and kindly point me in the right direction. 

I have a 3RZ in my FToy that I am completely re-doing the exhaust on.  It previously had an unknown long tube header (probably home built) and home built exhaust that really never fit right with the suspension and drivetrain components crammed into the chassis (custom box-tube frame, not a Toyota frame).  I just purchased a Doug Thorley shorty header (THY-511-C) that outlets into a single collector and does not have the EGR tube.  I have purchased and test fit multiple standard 2.5" and 3" reducers/connectors with gaskets and flanges...and none of them fit and bolt up to the bottom of the Thorley header.  The 3 bolt flange for the 2.5" is way too small.  And the flange for the 3" is too small by a hair. 

I spoke to a Doug Thorley person today, and he told me that it should bolt up to the factory Toyota exhaust.  I do not have any factory toyota exhaust components, and I have no idea what connector, flange and gasket I need to start the rest of my exhaust.  Can anyone point me in the direction of the correct connector, flange, and gasket I need to bolt up to this header?  I have attached a link to the Thorley header below.  Thanks in advance!,-single-outlet)_15771


  • Offline 4WD Legend
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Re: 3RZ Exhaust with Doug Thorley Shorty Header
« Reply #1 on: Sep 18, 2019, 01:50:11 PM »
Looks like stock manifold flange.  Go to the wrecker or talk to your local exhaust shop.
hold this. . .


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