best price on LT headers
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From: Sask. Canada
I've got nearly 3 years and over 50,000 miles on my obx system and no problems just make sure you get o2 extension for the upstream and good gaskets for the flange and you'll be set. I went with SCE full copper gaskets.
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Senior Member
Joined: Nov 2007
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From: Dracut, Massachusetts
Thanks for the feedback on the OBX. I plan on having the high flow cats. Living in MA. big brother is always watching, and listening. So I will definitely need a new muffler. I guess this is one instance where 10 inches isn't enough. lol. I like the Borla sound and quality. Now I need to find the right one. It will be a quick fix. When budget allows I will probably upgrade again to some kind of x pipe true dual configuration. More homework.
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Joined: Oct 2005
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From: MI
I've got the Roush offroad cat back . It's 3'' from the cats to the sido muffler. I think the outs are 2.5 " . The muffler is small. like 10 inches. I've been told they are made by Borla. I know what Im trying to do has been done many times. Nothing new here. I'm just looking for the best deal on the Best parts. Id like to install them right after I get my 2011 inspection sticker just in case its too loud, Ill have some time to enjoy it. Ooops , I mean fix it. ======== ======
Well 
- and if you didn't know already. -You can sell your factory cats to a salvage yard, for about the same price that a new set of high flows would cost you. So that's a wash basically.
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Senior Member
Joined: Nov 2007
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From: Dracut, Massachusetts
I didnt know
Thanks for the info. Ill have to look into that.
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From: Dracut, Massachusetts
The Dynatech system I was looking at had two highfows and a Y pipe and would bolt up to my Roush system, gaskets included. I have been told that the intermediate pipe that is supplied is crimped though. I was told to purchase some 3 inch tubing to create a less restrictive exit. So with a few feet of 304 and a new longer SIDO Borla, and the Dynatech system, and a tune . I should be able to grab a few more N/A ponies , and broaden my tourque curve.
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Joined: Oct 2005
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From: MI
Not unless your running a Blower or a stock system w/factory cats. That's when you run a 3" for the cat back. You need velocity and flow, they work together and you need the correct diameter pipes , to make it work for you. The wrong set up will cause gases to die in the pipes.
So, stick with 2.5 for the single when running LT's and HF's.
That's the easiest way to explain it.
So, stick with 2.5 for the single when running LT's and HF's.
That's the easiest way to explain it.
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Senior Member
Joined: Nov 2007
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From: Dracut, Massachusetts
What I was trying to say was . The Roush system has a 3" inlet . The Dyna tech intermediate pipe comming from the Y pipe is crimped so it isnt the full diameter. Replacing it with a piece that is 3" uncrimped will give a less restricted flow into the muffler.