Hypereutectic Cast -6cc Flat Top Pistons, 428, 4.000" Str,

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SKU: UEM-KB304

Flat Top -6cc
6.625" Rod Length
5/64", 5-64", 3/16" Ring Size
Press-fit or floating
.980 Pin
Set/8

Pricing: $489.95

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Description

These pistons are Hypereutectic 390 Alloy with 16% silicon. They feature a diamond-machined skirt design. Spiral lock rings. Press fit or bushed wrist pins. Designed for 14-degree heads, 1967 and later.

Pistons Only
.030 Over- 4.150" Bore- KB304-030
.040 Over- 4.160" Bore- KB304-040
.060 Over- 4.180" Bore- KB304-060

Pistons and Ring Sets
.030 Over- 4.150" Bore- KB304KTM-030
.040 Over- 4.160" Bore- KB304KTM-040
.060 Over- 4.180" Bore- KB304KTM-060

These pistons come with pin locks so they can be used with BUSHED or PRESS-FIT rods.

Image may not represent actual product.

Specifications/Information

It’s important to note that the Keith Black brand of hypereutectic pistons requires a much wider top ring end gap than traditional forged pistons. The KB spec is 0.0065-inch per inch for a street engine