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old31 · 06-03-2021, 06:03 AM

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I should have been more specific. Sorry.

What is the increase in HP with a header that goes directly out an exhaust pipe with no muffler?

06-03-2021, 06:03 AM	#6
old31 Senior Member Join Date: Jan 2016 Posts: 2,459	Re: Added HP for 2nd carb and header? Sponsored Links (Register now to hide all advertisements) I should have been more specific. Sorry. What is the increase in HP with a header that goes directly out an exhaust pipe with no muffler? Last edited by old31; 06-03-2021 at 06:16 AM.