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post #1 of 11 Old 02-06-2007, 11:51 AM Thread Starter
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Exhaust Question

I currently have a set of Kooks 1 and 3/4" headers sitting in my garage that I purchased to install on my car. These are stepped into 2" and into 3" connecting pipes for true 3" duals to the back.

I'm planning on installing a new 415-427 ci engine within the year.


Should I keep these headers or get 1 and 7/8" headers? I'm looking for a street driver with torque in mind and not a high revving track duty machine. I don't want to choke off the engine either. Your input is quickly asked because I have someone interested in my headers if I wish to sell.

Thanks.
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post #2 of 11 Old 02-06-2007, 12:09 PM
 
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On that size motor I don't think you would be hurt by 1 7/8ths primaries.
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post #3 of 11 Old 02-06-2007, 12:24 PM
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Depends on what heads you're using.
If you're using heads that flow huge numbers (like 320cfm+), then stepping up to the 1 7/8 headers would be a benefit, otherwise there woldn't be much to gain. But even keeping the ones you have certainly wouldn't choke it.

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post #4 of 11 Old 02-06-2007, 12:43 PM Thread Starter
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I'm looking at L92 or LS7 heads on this engine.

Last edited by USA1Camaro; 02-06-2007 at 12:48 PM.
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post #5 of 11 Old 02-06-2007, 06:58 PM
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You already have true duals?

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post #6 of 11 Old 02-06-2007, 07:10 PM Thread Starter
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Yes

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post #7 of 11 Old 02-06-2007, 07:16 PM
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Oh nvm I see its a GTO. I was trying to see how 3in duals would fit under a street driven 4th gen. Nice.

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post #8 of 11 Old 02-06-2007, 07:34 PM Thread Starter
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I'm looking at a LS7 or LSX even. Katech torquer cam and a few other goodies.
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post #9 of 11 Old 02-06-2007, 09:58 PM
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Nice looking exhaust setup!

Well, both the LS7 and L92 heads flow real well, so you would benefit a few ponies from the 1 7/8 headers. However, if you already have the others, just keep em, it's not gonna choke it.

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post #10 of 11 Old 02-10-2007, 01:40 PM Thread Starter
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Sold my headers today.

The guy pulled up and cash was exchanged in less than a minute. He didn't even want to open the box, but I insisted that he at least inspect them before he left.

I'll get the header with 1 and 7/8" primary tubes because the next engine will probably make good use of them.

Last edited by USA1Camaro; 02-10-2007 at 01:48 PM.
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