They love his 'hog' heads.(Baisley Hi-Performance, maker of cylinder heads for Harley-Davidson motorcycle engines)(Company Profile)

Patrons quietly sipping their beer in George's Corner Tavern at the intersection of North Interstate Avenue and Killingsworth Street may be unaware they are next door to the birthplace of powerful motorcycle engines. Behind a storefront that bears no sign and is simply decorated with an old black-and-white mural of racing Porsches, sits the home of Baisley Hi-Performance.

In this modest brick building, formerly the home of a Porsche shop, owner Dan Baisley creates high-performance cylinder heads that power Harley-Davidson motorcycles to record-breaking times. A ProStock Harley-Davidson drag bike equipped with Baisley heads has run a quarter of a mile in 7.93 seconds, …