What is the difference between HFC and test pipe?

Originally Posted by Westwood i was looking at the dyno sheets and test pipes have a few more hp compared to the sheet with hfc's True..Test Pipes do produce more

		Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Intake/Exhaust
What is the difference between HFC and test pipe?

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07-06-2010, 07:35 PM

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BOLIO 671

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Quote:

Originally Posted by Westwood

i was looking at the dyno sheets and test pipes have a few more hp compared to the sheet with hfc's

True..Test Pipes do produce more HP than HFC's bu not by much...and you will only see the gains at the top end

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