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Old 02-19-2018, 09:10 AM   #29
rontammy0
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Quote:
Originally Posted by Gunmetal Speedster View Post
You hit 500 wheel with longtubes, an intake, and a stage 3 cam? I'd like to know how you managed to do so!

Unfortunately, no. You'll either have to outsource or just buy TSP longtubes with their cats. It will be roughly the same amount and you'll buy it all in one place.
Whats your rwhp......i do see most bolton and cam setups seem to dyno around 470 to 480 range. 500 rwhp seems high
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Old 02-20-2018, 07:20 PM   #30
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Besides not being American made, what is the downside of using speed engineering versus something like TSP or Kooks. Also would it be possible to buy high flow cats from another company and use on the speed engineering long tubes? If possible which high flow cats do you guys recommend?
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Old 02-21-2018, 10:49 AM   #31
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Originally Posted by 1 Long onE View Post
Besides not being American made, what is the downside of using speed engineering versus something like TSP or Kooks. Also would it be possible to buy high flow cats from another company and use on the speed engineering long tubes? If possible which high flow cats do you guys recommend?
no downside, you just don't get to tell people you bought TSP, Kooks or ARH headers.

i run eastern catalytic high flow cats with my speed engineering headers. they're great and cost $75 a pop. magnaflow highflow cats also work just as well and are similarly priced.
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Old 02-23-2018, 12:14 AM   #32
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Texas speed high flow cats fit perfectly
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Old 02-23-2018, 04:45 PM   #33
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I think they are great. They will surface rust though. I’ve had them on my car for over 50K now with no gasket leaks !


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Old 05-14-2018, 02:31 PM   #34
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Any updates guys or any more feedback

Hi sorry for receiving an old thread . Just wanted to know if anyone had any more recent feedback . Strongly considering buying these due to price . Any gaps in Performance as compared to the more expensive brands ? Any feedback is appreciated !!
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Old 05-14-2018, 03:23 PM   #35
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Quote:
Originally Posted by Slvr-camaro15 View Post
Hi sorry for receiving an old thread . Just wanted to know if anyone had any more recent feedback . Strongly considering buying these due to price . Any gaps in Performance as compared to the more expensive brands ? Any feedback is appreciated !!
I just bought/installed these about 3 months ago on my 2012 LS3 and I'm pushing 425 to the wheels on a mustang dyno with Airaid CAI, and AMT Catback. Fitment was perfect. The only negative I have to say, was that I was unfortunate the have the exhaust leak at the connecting pipes. Nothing some good ol' welding can't fix.
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Old 05-16-2018, 03:32 PM   #36
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So if I use the off road pipes (No cats) how do I install my o2 sensors and not get any CEL? I am considering these since I have a Kraftwerks supercharger already, I dont need cats for emissions, but I dont want the light coming on
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Old 05-17-2018, 08:03 AM   #37
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a tune will get the light turned off. a tuner can tell the ECM to not worry about the down stream cats. thats what gets rid of the light.
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Old 05-19-2018, 08:53 AM   #38
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Just bought these. Only complaint is the dreaded header spacing. Going to need to put some dimples in there.
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Old 05-19-2018, 09:28 AM   #39
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Coat to install

Any ideas on how much people have been charging to install these headers ? Approximate ..I might pick up a set
But so far the quote I got here was $350 for the install . Seems a bit high .
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Old 05-19-2018, 09:36 AM   #40
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Quote:
Originally Posted by Slvr-camaro15 View Post
Any ideas on how much people have been charging to install these headers ? Approximate ..I might pick up a set
But so far the quote I got here was $350 for the install . Seems a bit high .

I was quoted 400 and 350 by two different places here. Despite being mechanically stunted, I did them on my own. As long as you can get the car up high enough to slide them in, it wasn't bad. I did have to buy new spark plug wires as I pulled one clean out of it's boot though. It was also fun to start the car running open headers too, before I connected the exhaust. The neighbors probably weren't so enthused about it, but I sure was smiling.
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Old 05-23-2018, 08:24 AM   #41
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Question

I am in the process of getting the speed engineering headers . For the people in this group that already have them .DID you order the connection pipes to the xpipe from speed engineering ? Or did u go with a different brand for the connection pipes . Also a few people mentioned that they purchased the connection flanges from summit since it was a better fit . What about the gasket ? Speed engineering as well ?would love to hear some more detailed information regarding this setup. I know my flowmaster catback has 3 inch piping . Please advise GURUS !!!
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Old 06-18-2018, 09:56 AM   #42
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For those of you that have installed these headers specifically, did you have to use O2 extension cables?
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