Just
slide the piston and rod assembly down into the tapered ring compressor. The
taper will create a squeezing of the piston rings allowing the
piston and rod to gradually enter the engine bore.
Will help simplify the piston installation process during engine building.
**** Most all bore sizes
available. Message for your specific bore sizes if you dont see them listed.
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***Item is 3D printed with durable printing filament.