Silvolite Piston Set, 1539.040

Silv-O-Lite Piston - Pontiac 151ci/2.5L (L4)

Flat top.

Sold As: Sold as a set, priced per set

Engine Manufacturer: Pontiac

Engine Family: GM L4

OE Cross Reference: 547147

Engine Displacement (Liters): 2.5

Engine Displacement (cubic inches): 151

Piston Head Type: Flat

Compression Ratio: 8.1

Top Land: 0.295

Pin Type: Press

Oil Ring Thickness IN: .1875"

Top Compression Ring Thickness IN: .0781"

Bore Diameter IN: 4

Compression Height IN: 1.57

Compression Height MM: 39.9

Second Compression Ring Thickness IN: .0781"

Bore Diameter MM: 101.6

Piston Pin Outside Diameter IN: 0.927

Piston Pin Outside Diameter MM: 23.5

Pin Configuration: Offset

Piston Material: Cast 332 Alloy

Oversize: .040"

Crown Type: FLAT TOP

Oversized: Yes

Year Range: 1977-1978

Pin Number: 0927x300A

Oversizes: STD, .020, .030, .040, .060

Year From: 1977

Base Number: 1539

Year To: 1978

Ring Pack: 5/64, 5/64, 3/16