Proper Header Diameter for 440 CI
#1
Teching In
Thread Starter
Join Date: May 2005
Location: Upper West Side, New York City/Very Downtown, Houston
Posts: 28
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a 440 stroker w/ TFS 235 and a fats 90/90 in my 2004 zo6.
Currently it is making 550/520 through lg 1 3/4 headers and stock tis.
I am going to intsll electric cutouts, but I want to know what diameter header I should get. (2 or 1 7/8)? Also, what brand?
Thanks in advance and I know I may get a lot of differing opinions.
Currently it is making 550/520 through lg 1 3/4 headers and stock tis.
I am going to intsll electric cutouts, but I want to know what diameter header I should get. (2 or 1 7/8)? Also, what brand?
Thanks in advance and I know I may get a lot of differing opinions.
#7
TECH Enthusiast
iTrader: (1)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I would go with 2" regardless of your setup (NA, FI). Driveability will only be affected in the sense that you will lose low end, but you will gain up top. With that displacement youll have more than enough low end to even tell the difference anyway. What are your cam specs?
Trending Topics
#11
Teching In
iTrader: (3)
Join Date: May 2009
Location: fl
Posts: 14
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I would go with 2" regardless of your setup (NA, FI). Driveability will only be affected in the sense that you will lose low end, but you will gain up top. With that displacement youll have more than enough low end to even tell the difference anyway. What are your cam specs?
Being a kooks guy I'll add to that vote!
#12
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
1-7/8's unless you're looking to be over 800 to the tire no need for 2". At your current HP level I bet the 1-3/4 are'nt hurting you enough to warrent changing them. If you want call the shop and speak to Nick and go over your combo with him and any more mods you plan like forced induction and we'll point you in the right direction.
#13
Teching In
Thread Starter
Join Date: May 2005
Location: Upper West Side, New York City/Very Downtown, Houston
Posts: 28
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Thanks to all and I will give AHR a ring.
As for differences between Kooks and AHR, do both have merge collectors? (My tuner here in Texas is a Kooks dealer so obviously he wants to sell me Kooks). I just need to know advantages/disadvantages of each and if differences are significant.
As for differences between Kooks and AHR, do both have merge collectors? (My tuner here in Texas is a Kooks dealer so obviously he wants to sell me Kooks). I just need to know advantages/disadvantages of each and if differences are significant.