SILVOLITE 186+0.030" FLAT TOP PISTONS & HASTING MOLY RINGS [HOLDEN 6-CYL 186 RED MOTOR]

186+0.030" SILVOLITE PERFORMANCE HYPEREUTECTIC FLAT TOP PISTONS &
HASTINGS MOLY PISTON RING SET
HOLDEN 6 CYLINDER 179 & 186 RED MOTOR

08/1963-1971 HOLDEN [EH-HD-HR-HK-HT-HG SERIES]
08/1970-1972 HOLDEN [LC TORANA GTR-XU1]

Hypereutectic pistons are cast using hyper eutectic alloy, that is a metallic alloy which has a composition beyond the eutectic point. Hypereutectic pistons are made of an aluminum alloy which has much more silicon present than is soluble in aluminum at the operating temperature.

By adding silicon to the piston's alloy, the piston expansion is dramatically reduced to specify reduced clearance between the piston and the cylinder wall. Silicon itself expands less than aluminium. Another benefit of adding silicon is that the piston becomes harder and is less susceptible to scuffing which can occur when a soft aluminum piston is cold-revved in a relatively dry cylinder on start-up or during abnormally high operating temperatures.

The High Performance Flat Top Hypereutectic Pistons, Moly Piston Rings and Gudgeon Pins are made to the highest standard and exceed original manufacturers specifications for longevity, smooth operation and maximum performance.

SPECIFICATIONS:
Standard Bore Size: 3.625" / 92.075mm
Size: +0.030" / 0.75mm
Head Type: FLAT TOP
Piston Type: CAST HYPEREUTECTIC
Stroke: 3.000" / 76.20mm
Length: 2.820"
Compression Height: 1.780"
Pin Size: 0.866" x 2.475"
Pin Type: PRESS FIT
Top Ring Width: 5/64"
2nd Ring Width: 5/64"
Oil Ring Width: 3/16"

The pistons are manufactured in America (Mexico) by Silvolite, which had being making pistons since 1922. The moly piston rings are manufactured in the United States of America by Hastings leaders in Piston Ring technologies and have been in business for over a hundred years.

SPECIAL NOTE:
3.655" ENGINE BLOCK BORE SIZE (3.625" +0.030")

MADE IN USA & MEXICO