10-02-2021, 01:26 PM
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Ultimate Warrior
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Join Date: Nov 2016
Location: Seattle, WA
Posts: 1,933
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H-pipes and X-pipes do make more power. It has been tested extensively and proven on the Engine Masters show.
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1966 Pontiac GTO ( restoration thread)
1998 BMW 328is ( track rat)
2023 Subaru Crosstrek Limited ( daily)
View my photos: Caught in the Wild
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