NM2255 on MSN

Porsche 718 GT4 RS Flat-Six Engine Note 9,000 RPM Dyno

The Porsche 718 GT4 RS delivers an incredible naturally aspirated 4.0L flat-six engine note reaching 9,000 RPM during dyno ...
Rennlist

Inside Singer & Cosworth’s 8,500-RPM Porsche Flat-Six

Built from a classic Porsche crankcase, Singer’s latest flat-six blends vintage soul with cutting-edge performance.
AOL

Porsche's Best Kept Secret: The Most Affordable Way to Own a 4.0L Flat-Six

There are a lot of awesome six-cylinder engines out there, although these days the vast majority are turbocharged or hybridized. That doesn't make them any less special, but the responsiveness and ...
NM2255 on MSN

Porsche 718 GT4 RS flat-six sound 9,000 RPM dyno

The Porsche 718 GT4 RS fitted with a full Akrapovic exhaust and headers delivers an even sharper naturally aspirated flat-six ...