What header size should I get? 1 5/8 or 1 3/4?
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What header size should I get? 1 5/8 or 1 3/4?
I am going to be getting headers pretty soon and I was wondering which size I should get. Should I get long tube 1 5/8 or 1 3/4? I am going to keep the car naturally aspirated so I dont know if bigger is actually better.

Uncle Banjo- BMMC V6 Member

- Number of posts: 64
Age: 23
Location: Tahlequah, Ok
Car Type: 2009 Shelby GT500
First Name: BJ
Registration date: 2008-12-30
Re: What header size should I get? 1 5/8 or 1 3/4?
I believe 1 5/8 if your staying Naturally Aspirated. If going forced induction down the road then go bigger
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Re: What header size should I get? 1 5/8 or 1 3/4?
Yep the 1 5/8 should work fine for na
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'07 Shelby GT500


07Shelby500- BMMC Board Member

- Number of posts: 9049
Age: 36
Location: Owasso Oklahoma
Car Type: The thing which must not be spoken of
First Name: David
Registration date: 2008-03-10
Re: What header size should I get? 1 5/8 or 1 3/4?
Yep the 1 5/8 should work fine for na
It may work fine but would he get more hp with bigger? even like 1-5 more hp? it is also going to have a cam...
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Re: What header size should I get? 1 5/8 or 1 3/4?
You wont see any gains without going FI. Better off spending the extra dough on some good tires or suspension mods. All the power in the world wont do any good if you cant put it to the ground.
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'07 Shelby GT500


07Shelby500- BMMC Board Member

- Number of posts: 9049
Age: 36
Location: Owasso Oklahoma
Car Type: The thing which must not be spoken of
First Name: David
Registration date: 2008-03-10
Re: What header size should I get? 1 5/8 or 1 3/4?
Like David said...no need for larger tubing...its a waste of money if your not going to use the added volume and velocity. There is a cost difference usually between the two and IM sure no one wants to waste money
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Re: What header size should I get? 1 5/8 or 1 3/4?
Awesome! Thanks guys! I will prob get 1 5/8 then! But if I get up to 1000 HP+ Ill get bigger ones! LMAO! HAHA! I wish! LOL!

Uncle Banjo- BMMC V6 Member

- Number of posts: 64
Age: 23
Location: Tahlequah, Ok
Car Type: 2009 Shelby GT500
First Name: BJ
Registration date: 2008-12-30
Re: What header size should I get? 1 5/8 or 1 3/4?
i have 1 5/8s they make a good rumble and a noticable power increase(not much though) need a new tune to feel i i guess. will find out wednesday

ARMORINE- Paul's 2 Star Atta-Boy Award!

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Age: 23
Location: Tulsa, Oklahoma
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First Name: Jared
Registration date: 2008-04-01
Re: What header size should I get? 1 5/8 or 1 3/4?
Grabber07' wrote:Holy OLD thread Batman!
Hey, it was joshua

Guest- Guest
Re: What header size should I get? 1 5/8 or 1 3/4?
I just hate creating sensless threads when there are already threads about the same subject. It makes less threads new users have to read. All the info is in one thread. Justin I am glad you like yours. I think BJ and I are going with 1 5/8s as well.
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