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Old 10-15-2018, 11:13 PM   #1
zlathim
 
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Header Install: A few questions

Im installing Stainelss Power 1 7/8" LT headers w/ hi-flo cats on my 2010 SS M6. The headers are awesome and fit perfectly on mock-up. I'm very pleased with the completeness of the kit from Stainless Works.

In the kit, they supply a tube of high temp silicone rtv and the directions say to just use the supplied rtv, no gasket. I called the Stainless Works tech line and the guy said that is what they use for performance testing, but he gets these calls all the time. He said I could use factory gaskets if it makes me feel better.

Have any of you used just the rtv sealent to install your headers? How did it work? Do you wish you would have just used gaskets?

Also, where are guys putting the wideband O2 sensor bung when running cats? Guage instructions say before cat, but a couple people are telling me not o put it in the header collector. The next available spot to put it is after the cat. One guy I trust told me to put it after the cat. Any thoughts?

Thanks in advance for the help.

Zane
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Old 10-15-2018, 11:19 PM   #2
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RTV will work, but will be a pain to get off in the future and a pay to scrape off. Id recommend using OEM gaskets. Widebands get installed before the cat
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Old 10-15-2018, 11:36 PM   #3
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Use new factory GM metal gaskets that came on the car.
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Old 10-15-2018, 11:37 PM   #4
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Thanks. I think oem gaskets will be easier to install anyway. I'm going to pick up a set in the morning. What you say about the bung placement for the wideband makes sense to me. I'm going to take it to an exhaust shop to get it welded in.

Here's another question: The PO installed a 3" Flowmaster cat-back, and The Stainless Works set up I am intalling is 3", but they both neck down to 2 1/2" where they mate up. Is that short 2-3" section of 2 1/2" going to be a restriction I need to worry about? I am thinking about asking the exhaust shop to put a 3" flange coupler there to remove the restriction and provide easier teardown in the future. Thoughts?

Last edited by zlathim; 10-15-2018 at 11:53 PM.
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Old 10-15-2018, 11:46 PM   #5
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Quote:
Originally Posted by zlathim View Post
Thanks. I think oem gaskets will be easier to install anyway. I'm going to pick up a set in the morning. What you say about the bung placement for the wideband makes sense to me. I'm going to take it to an exhaust shop to get it welded in.

Here's another question: The PO installed a 3" Flowmaster cat-back, and The Stainless Works set up I am intalling is 3", but they both neck down to 2 1/2" where they mate up. Is that short 2-3" section of 2 1/2" going to be a restriction I need to worry about? I am thinking about asking the exhaust shop to put a 3" flange couple there to remove the restriction. Thoughts?
The O2 sensor bung is good just make sure it points towards the center of the car and no the outside so the sensor has room.

Stainless works has a performance connection option that gets rid of the 2.5 inch connection. Call them and ask about it, maybe you can return it and get that set up
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Old 10-15-2018, 11:54 PM   #6
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SW performance connection to their cat back 3 inch all the way

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Old 10-16-2018, 12:14 AM   #7
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Quote:
Originally Posted by zz430camaro View Post
The O2 sensor bung is good just make sure it points towards the center of the car and no the outside so the sensor has room.

Stainless works has a performance connection option that gets rid of the 2.5 inch connection. Call them and ask about it, maybe you can return it and get that set up
Excellent. Thank you. This is exactly the kind of advice I was hoping for. I'll give them a call in the AM.
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Old 10-16-2018, 12:45 AM   #8
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Another question-

I'm seeing guys using anti-seize on the header bolts on a few youtube videos. I like anti-seize, but I seem to remember hearing that its not advisable to use anti-seize on a steel bolt in an aluminum head. Am I imagining things or is that a thing?
Please forgive the stupid questions. I've been fiddling with the Camaro and drinking a few beers today. I'm about 8 beers in now...
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Old 10-16-2018, 01:35 AM   #9
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Originally Posted by zlathim View Post
Another question-

I'm seeing guys using anti-seize on the header bolts on a few youtube videos. I like anti-seize, but I seem to remember hearing that its not advisable to use anti-seize on a steel bolt in an aluminum head. Am I imagining things or is that a thing?
Please forgive the stupid questions. I've been fiddling with the Camaro and drinking a few beers today. I'm about 8 beers in now...
A little anti seize wont hurt anything, its used all the time on spark plugs in aluminim heads.

A stupid question is the one thats not asked.
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Old 10-16-2018, 01:42 AM   #10
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A little anti seize wont hurt anything,
Thanks!! And a little bit is right. Anti-seize is the herpes of mechanical work!! Impossible to keep it off you!!
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Old 10-16-2018, 10:18 AM   #11
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Just installed long tubes this weekend, use the stock OEM gaskets, and yes use a little bit of anti-seize on all the bolts.
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Old 10-16-2018, 02:43 PM   #12
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Thanks for all the advice guys. I bought new GM gaskets and installed them this morning. Bolts are anti-seized and torqued down. Should finish everything up later tonight after I deal with some family stuff.
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Old 10-16-2018, 03:00 PM   #13
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I just put a set of these on myself with a oil cooler delete coolant flush and painted the valve covers i cant ever just do one thing at a time
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[/SIGPIC]10 2ss ls3 sw long tubes,cai intake,phastek scoop,se3" exhaust,elite e2, bw stg2tb,sctx4 dynosteve tune,tick billet master,mgw retro shifter,monster lt1-s,hurst line lock,racestars and 4.10s on the shelf
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Old 10-16-2018, 07:05 PM   #14
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Looks great!! Am I going to regret not getting the insulated spark plug wire boots?
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