Proform 66766 4.000-4.090 Range
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Putting the connecting rod through first, simply place the piston (with rings) into the tapered end of the ring compressor. Tighten the compressor snugly around the base of the piston. Then lay the compressor flat on the engine cylinder bore.
Adjustable Piston Ring Compressor Tool
Please review Specifications and the detailed fitment table for notes and exceptions.