2.5litre flatsix engine; Porsche Boxster (986); 1997
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Jae Lee Drives A 1973 Porsche 911 With A Massive Air-Cooled And Naturally-Aspirated 4.4-Liter Flat-Six That He Built • Petrolicious
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Amazon.com: Porsche 911 Flat-Six Boxer Engine : Toys & Games
Hurrah! Porsche's 4.0 flat-six has years of life left in it | Top Gear
Modified 3.6L Porsche Flat-Six Engine for sale on BaT Auctions - closed on November 23, 2018 (Lot #14,291) | Bring a Trailer
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A 500-HP Air-Cooled Porsche Flat-Six from Singer and Williams | News | Car and Driver
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For Sale: A Modified 1969 Porsche 911 Flat-Six
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3.8-litre flat-six engine; Porsche 911 Carrera S (991); 2011,
