Quick Overview

These are 13cc domed pistons made by Diamond. These are ceramic coated o the top and dry films around the sides. These feature intake valve notches. 1.5/1.5/3.0 ring pack. No rings. This is a 10 piston set (5R/5L)

Bore = 3.700" Piston CD = 1.140"

Offset piston pin - .866" pins NOT included

Diamond Piston Spec sheet available

Compression Ratio with 53cc 4v heads

4.6L deck / stroke = 10.6 to 1

5.4L deck / stroke = 9.9 to 1

4.6L deck / 3.75" stroke = 12 to 1