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The Manley Platinum Series Pistons are constructed from a 2618 high strength material and feature a hollow dome for a lightweight design. They are great for drag race applications. The Platinum Series also feature exact ring groove to skirt squareness and a full banded skirt design for increased skirt stability.

Compression Ratio Chart
Bore	Stroke	112cc	118cc	124cc
4.500"	4.250"	15.2:1	14.2:1	13.3:1
4.530"	4.250"	15.4:1	14.4:1	13.5:1
4.560"	4.250"	15.6:1	14.6:1	13.6:1
4.600"	4.250"	15.8:1	14.8:1	13.8:1

Features and Specs
Top Ring:	1/16", .300" down
Second Ring:	1/16"
Oil Ring:	3/16"
Intake Valve Notch:	.300"
Exhaust Valve:	+.090"
Pin Included:	Tool Steel, .150" Wall, 147 grams, 2.930" Long, .990" Dia.
Spiral Locks:	.042" Wide (4/piston)
Recommended Piston Clearance:	.006" measured 1.100" from bottom of the oil ring