The JUN Super Piston Kit, manufactured by Cosworth in Britain, is designed for corresponding to high boost, high rotation and high response. This is produced in purpose of reducing blow-by gas as well as boosting response up. The materials for this piston is the special aluminum for forging-use with manufacturing 400t press into the mold. Durability is just excellent.

-Bore: 87.25

-Weight: 377g

-Comp. Height: 31

-Piston Crown: Convex

-Piston Pin Weight: 102g

-Piston Pin Diameter: 22

-Top Piston Ring: 1.2

-2nd Piston Ring: 1.2

-Oil Piston Ring: 2.8

**Modifications are needed if using in conjunction with OEM Con Rods

**Sleeves must be changed except for the BB1/BB4

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