Picture this: you're deep into rebuilding that trusty VW air-cooled engine, and deck height is throwing off your compression numbers. Instead of shipping cylinders off for expensive machining, slip in these 94mm cylinder shims. They're a straightforward fix that pros and backyard mechanics swear by for dialing in the right clearance every time.
In air-cooled VW engines—from classic Bugs and Super Beetles to Ghi as, Buses, Type 3s, and even Things—deck height sets the stage for combustion efficiency, power output, and longevity. Too much clearance, and you lose compression; too little, and you risk piston slap or worse. These shims let you compensate for increased stroke from a stroker crank or when you've surfaced the case for flatness, bringing everything back into spec without drama.
Crafted from durable steel, each shim measures 94mm inside diameter and .040 inches (1mm) thick. They're pre-cleared for both 8mm and 10mm studs, though a quick file might be needed for perfect fitment on some setups. Sold as a set of four, they're just the right amount for most single-cylinder adjustments. Feel the solid heft in your hand—they're made to handle the heat and pressure of engine assembly.
During a full engine refresh on your dune buggy, use one or two shims per cylinder to hit that ideal .040" deck. Or, if you've bored out for oversized pistons, stack them to fine-tune. Mechanics love how they save time and money compared to custom machining. I've used them on my '68 Bus rebuild—compression jumped, and it idles smoother than ever.
Whether you're chasing more horsepower or just want reliable daily driving, these EMPI 21-7440 shims are your go-to for precise, no-fuss engine work. Order the set and get back to wrenching.
