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helix vs stillen test pipes

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Old May 27, 2004 | 12:04 AM
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RA11325
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Default helix vs stillen test pipes
whats the piping diameters on each? which one make more power?

help!
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Old May 27, 2004 | 02:59 AM
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Default Re: helix vs stillen test pipes
Originally posted by Vash350Z
whats the piping diameters on each? which one make more power?

help!
Helix TP dia is 2.25". I dont now about the stillens.
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