Make ring gap measuring fast, accurate, and hassle-free. The CB Performance Ring Gap Alignment Tool is designed to quickly and precisely square your piston rings in the cylinder bore—ensuring they're in the proper position for accurate end gap measurement.

Correctly setting piston ring end gap is a critical step in engine building, yet it's often overlooked. Whether you're using a manual or electric ring filer, this tool is the essential first step for a precise fit and optimal engine performance.

This 3-piece kit is ideal for the busy engine builder and covers bore sizes from 85.5mm to 94mm, making it perfect for a wide range of aircooled VW engines. Also sold separately 85.5 - 88mm, 90.5 - 92mm, 94mm.