KOOKS NEW 2" RACE HEADER
I would think alot of these Aftermarket parts will go on sale now that the thansgiving holiday is behind us ,Nice headers , i am going the 2inch route & The 3inch Exhaust on my 402 ,along with the Borla stingers & The Novi 2k ,It should wake the dead for sure 
George-I hear that you have 2" headers for the C5's now as well. Question-I'm pretty sure the set you made for Jeff(American HP) had a 3" collector-if you made them with a 3.5 collector could you make them with a 3.5" mid pipes to the catback going down to 3" and would it clear the tunnel on a C5? Also could it be made without the X-pipe?
Thanks!
Thanks!
George-I hear that you have 2" headers for the C5's now as well. Question-I'm pretty sure the set you made for Jeff(American HP) had a 3" collector-if you made them with a 3.5 collector could you make them with a 3.5" mid pipes to the catback going down to 3" and would it clear the tunnel on a C5? Also could it be made without the X-pipe?
Thanks!
Thanks!
that would be nice.... try to let us know also b/c we are goin to order a set on monday for our 427 LSX F1 build.....
Teching In
Joined: Mar 2004
Posts: 31
Likes: 0
At what point would a 2" header be beneficial? Reading around LG claims that there 1 3/4" headers makes the most power across the board, but most recommend 1 7/8" for 427's. I plan for a cam and maybe some headwork on my LS7 with stock heads.
TECH Apprentice
Joined: Nov 2006
Posts: 369
Likes: 0
From: Copenhagen
We're running the 1 7/8 to 2 stepped lts. We just went 9.94 on a carb'd 417ci combo on untuned shakedown passes. These headers rock! But... now I want a set of 2" headers 
Props to Kooks, awesome quality and superb power.
Props to Kooks, awesome quality and superb power.
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Okay dragging up an old thread, but at what point are the true 2" headers needed?
LSX 454 with a P/P LS7 top end that will have an occasion hit from a direct port 200 shot on it?
How will they have an effect on the torque curve? Hurt down low but open up the power on the top end? I am wondering if they are worth it with the LS7 intake being a choke point on the opposite end of the spectrum?
1 7/8" or 2"???
LSX 454 with a P/P LS7 top end that will have an occasion hit from a direct port 200 shot on it?
How will they have an effect on the torque curve? Hurt down low but open up the power on the top end? I am wondering if they are worth it with the LS7 intake being a choke point on the opposite end of the spectrum?
1 7/8" or 2"???
Okay dragging up an old thread, but at what point are the true 2" headers needed?
LSX 454 with a P/P LS7 top end that will have an occasion hit from a direct port 200 shot on it?
How will they have an effect on the torque curve? Hurt down low but open up the power on the top end? I am wondering if they are worth it with the LS7 intake being a choke point on the opposite end of the spectrum?
1 7/8" or 2"???
LSX 454 with a P/P LS7 top end that will have an occasion hit from a direct port 200 shot on it?
How will they have an effect on the torque curve? Hurt down low but open up the power on the top end? I am wondering if they are worth it with the LS7 intake being a choke point on the opposite end of the spectrum?
1 7/8" or 2"???
