Cal-Van - Allstart 641-3 Piston Ring Compressor Band 3-3/8 to 3-5/8 Inch

The Cal-Van - Allstart 641-3 is a precision piston ring compressor band designed for professional engine rebuilds and piston installation. This adjustable band compressor fits pistons ranging from 3-3/8 inches to 3-5/8 inches in diameter, making it compatible with a wide variety of small block and performance engines.

Key Features:

• Adjustable design fits piston diameters from 3-3/8" to 3-5/8"
• Uniform compression of piston rings for safe installation
• Durable construction withstands repeated use in professional shops
• Prevents ring breakage during piston installation into cylinder bores
• Essential tool for engine assembly and rebuilding

This piston ring band compressor provides even, controlled compression around the entire circumference of the piston rings, allowing the piston assembly to slide smoothly into the cylinder bore without damaging the rings. An indispensable tool for mechanics, engine builders, and DIY enthusiasts performing engine work.