Offenhauser Insanity in PA!

Yes, we know we often wax giddy over the might of Suzuki's 1.3L hellion of a motorcycle engine, but let's face it, the 'Busa ain't a patch on the Offenhauser, which is simply the most badass four-cylinder motor ever conceived. Great looks, great power, (15:1 compression!) DOHC, four valves and a career that spanned decades in top-rank motorsport competition. And that unholy sound! On May 10th, a gaggle of front-engined Indy roadsters will gather at Jennerstown Speedway in Pennsylvania, spanning the ages from the 1930s to 1970. No turbos allowed.

Historic Offenhauser Indianapolis Racing cars come to Jennerstown Speedway [Daily American]

Related:
Indy Retroness: Offy, Mofos! [Internal]