Hedman Headers what front Y pipe?
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Burning Brakes
Joined: Jun 2006
Posts: 1,096
Likes: 28
From: Baltimore MD
Originally Posted by AGENT 86
Yup 
fwiw, I made just over 500rwhp with 1-5/8" longtubes on another car. I can't see why I would/should need 1-3/4" longtubes (TPiS, Hooker) on something that makes 1/2 that, or less.
Besides, that'll open up the cylinder head budget some more...lol
How's spark plug access?
Last Gear Tapped
Joined: Jun 2010
Posts: 25
Likes: 1
From: Polson MT
Did you delete the main center cat? I just purchased the elites, and I'm deleting all the cats on my 90'. I have a set of corsa mufflers. What do u do with the egr port(passenger side rear of intake) on the intake manifold? Plug it? I sure hope the ecm won't throw a code and make it run bad. Is there any 02 sensors in the exhaust on my car? As long as the sensor is in front of the cats, the ecm wont know if the cats are there or not, right?
Last edited by CDVBMX304; Jul 9, 2010 at 01:55 AM.
Team Owner
Joined: Jan 2003
Posts: 20,304
Likes: 240
From: Summerland B.C. Canada
I like your picture.
Did you delete the main center cat? I just purchased the elites, and I'm deleting all the cats on my 90'. I have a set of corsa mufflers. What do u do with the egr port(passenger side rear of intake) on the intake manifold? Plug it? I sure hope the ecm won't throw a code and make it run bad. Is there any 02 sensors in the exhaust on my car? As long as the sensor is in front of the cats, the ecm wont know if the cats are there or not, right?
Did you delete the main center cat? I just purchased the elites, and I'm deleting all the cats on my 90'. I have a set of corsa mufflers. What do u do with the egr port(passenger side rear of intake) on the intake manifold? Plug it? I sure hope the ecm won't throw a code and make it run bad. Is there any 02 sensors in the exhaust on my car? As long as the sensor is in front of the cats, the ecm wont know if the cats are there or not, right?
As for the O2 sensor, there is only one and it is before pre cat on drivers side. I bought an O2 bung and welded it into the ball socket flange that comes with the Elites. I didn't want to mess up the coating on any part of the header.
Last Gear Tapped
Joined: Jun 2010
Posts: 25
Likes: 1
From: Polson MT
Yes, I made a block off plate for the intake's EGR port and yes, I removed the main cat. I cut the the main cat's rear flange off and welded it to a piece of 3" pipe, so it was the same length as cat. That way my Magnaflow cat back is still a direct bolt on.
As for the O2 sensor, there is only one and it is before pre cat on drivers side. I bought an O2 bung and welded it into the ball socket flange that comes with the Elites. I didn't want to mess up the coating on any part of the header.
As for the O2 sensor, there is only one and it is before pre cat on drivers side. I bought an O2 bung and welded it into the ball socket flange that comes with the Elites. I didn't want to mess up the coating on any part of the header.
What size bung for the 02 sensor (inside thread)? do you have any pics of the bung location?. Sounds like you lengthened your wires also. Soldered?
Team Owner
Joined: Jan 2003
Posts: 20,304
Likes: 240
From: Summerland B.C. Canada
I used a heated O2 sensor, so yes I had to lengthen and add a wire.
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Hedman makes a collector flange that already has an O2 bung welded in.
For the OP; you will have to remove the starter to get the passenger side header in place. Then re-install the starter before bolting the header in place. Once the header is installed the factory starter will not come out without pulling the header.
Also go really careful when removing the dipstick tube. That has to come out too.
For the OP; you will have to remove the starter to get the passenger side header in place. Then re-install the starter before bolting the header in place. Once the header is installed the factory starter will not come out without pulling the header.
Also go really careful when removing the dipstick tube. That has to come out too.
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Look at this:http://forums.corvetteforum.com/c4-t...te-videos.html
I followed Agent86's recomdation and it worked great.
I followed Agent86's recomdation and it worked great.
