Thread: Which Headers
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Old 02-24-2024, 03:58 PM   #7
johnneilson
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Join Date: Jun 2010
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Default Re: Which Headers

Good question
You will get opinions
Logic would suggest a tube header will just offer better performance than a cast manifold type
This is not always true
Besides a 10% performance difference is on the order of 5-10 hp

If you are going above 250 hp you need a tuned system
For that start with 1-3/4” for 10-11” then step up to 1-7/8 for 22-24”
Then into a merge and 2-1/2 exhaust

J
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