Here is the ultimate tool to press the cylinders in and out of the water jacket on GT3, Turbo, and RS/RSR 996/997 engines. This kit includes everything you need to safely, accurately, quickly, and conveniently perform this critical task. Each kit contains: ring compressor (1 @102.7)*, Delrin cylinder spacers (4), complete stainless steel/AL press, aluminum cylinder bushing, bolts, and a sturdy storage case. *100mm ring compressor (1) available separately.