Machinist-operated since 1998, Cylinder Head Services at 3760 Hancock St in Point Loma is a one-off specialty engine machine shop serving classic-car restorers, racers, air conditioning repair, and general-repair shops across the Midway District. Valve jobs, head surfacing, and complete top-end rebuilds span everything from flathead Ford blocks to BMW M-series straight-sixes, the same European engine architecture overhauled at Steve's Beemer & Benz, Inc down the corridor. The two-person shop runs manual and CNC machining equipment calibrated for tolerances under one ten-thousandth of an inch on crank journals and bearing surfaces. Motorcycle cylinder heads also rotate through the queue, including Harley-Davidson and vintage Japanese twins that share bore specs with the powersport engines serviced at Superbike Powersports. The shop's highest-demand work involves Bonneville-class race-engine builds requiring custom valve seat angles, ported intake runners, and competition-clearanced combustion chambers machined to a target cc volume.