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2007 Escalade, 2010 CTS V soon... =)
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Discussion Starter #1
I am ordering my headers from Kooks tomorrow for my LS6 and I am trying to decide between the 1 3/4 or the 1 7/8. I already have BB exhaust with X pipe and a K&N CAI. I plan to do cam and heads and a TPIS or fast 90 & 90mm ported TB in like 2 to 3 months. Later down the road I might S/C the V so i want to get the right size headers. Is anyone running the 1 7/8" headers because all i ever see is the 1 3/4" on most peoples V's :confused:
 

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2016 ATS Premium 6-spd MT
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13,987 Posts
I have 1-3/4 and have heard that 1-7/8 is better for S/C. However, I'm going S/C and have no plans to change to the larger ones. IMHO, unless you're counting each and every little hp, 1-3/4 will be just fine.

Whoa! Just realized ... lots of cool, modded V's being put together all over the place! Your's sounds really cool! :highfive:
 

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2007 Escalade, 2010 CTS V soon... =)
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820 Posts
Discussion Starter #3
Whoa! Just realized ... lots of cool, modded V's being put together all over the place! You're going in the same direction I am! :highfive:
Hell ya i am completely addicted now! :highfive:
 

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id stick with 3/4 unless ur doing heads cam....or run super amounts of boost (which id assume ud keep her nice and safe)
 

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See you in the funny papers
04 CTS-V, 05 STS, 07 SRX- All sold :(
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George at Kooks told me that the 1 7/8 were only for insanely built engines (mega choppy cam, huge heads, and gigantic intakes). I'd say stick with the 1 3/4.
 

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2007 Escalade, 2010 CTS V soon... =)
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820 Posts
Discussion Starter #7
George at Kooks told me that the 1 7/8 were only for insanely built engines (mega choppy cam, huge heads, and gigantic intakes). I'd say stick with the 1 3/4.
Tony if I am planing to bulid the engine up in the next couple of months is there any negative effects to running the 1 7/8 headers vs the 1 3/4 headers when the car is not fully built or S/C ?
 

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See you in the funny papers
04 CTS-V, 05 STS, 07 SRX- All sold :(
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26,239 Posts
You trade bottom end torque for top end HP with larger diameter headers. On a built motor you don't even notice, but you may on the stock LS6. Other than that, there's no real negative effects.
 

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2007 Escalade, 2010 CTS V soon... =)
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820 Posts
Discussion Starter #10
you, getting headers :histeric: I'll believe it when I see it...and I'm not helping, I mean 'doing' the install for you if you do get them......fuger, don't worry I'll catch up soon. :D
In 3 weeks they will be here. I had a really nice talk with Kooks yesterday and it looks like i have a new advertiser...:thumbsup: Oh and f#@$%&$ what do you mean you wont help 'do' the install with me...:mad: j/k lol... Don't worry bro there are getting installed in Pompano and getting dyno tuned that day... As for catching up i am talking to someone else about advertising right now and this mod will deff void the warranty...:stirpot:
 

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2007 Escalade, 2010 CTS V soon... =)
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820 Posts
Discussion Starter #11
You trade bottom end torque for top end HP with larger diameter headers. On a built motor you don't even notice, but you may on the stock LS6. Other than that, there's no real negative effects.
Thanks Tony for the info.
 

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2007 Escalade, 2010 CTS V soon... =)
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Discussion Starter #12
Ok i talked to Kooks today and i went for the 1 3/4".
 
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