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If you are running todays regular unleaded gas you must pay attention to compression. These new design AE pistons are designed for modern fuels and compression. Typically installation will result in 8.8:1 compression (the original "S was 9.75:1 and would never last without special efforts). Current pistons differ from the 60s originals, improved with a "low drag" slipper skirt design and a shorter lighter wrist pin. Wrist pin height is 1.4689", top is dished 8.4cc, and they have a 4mm oil ring and two 1.5mm compression rings.  Set of 4 pistons complete with rings and pins.
1275 +.040 8.8:1 Piston Set With Rings & Pins

1275 +.040 8.8:1 Piston Set With Rings & Pins

1275 +.040 8.8:1 Piston Set With Rings & Pins
Select variations below for more info:
If you are running todays regular unleaded gas you must pay attention to compression. These new design AE pistons are designed for modern fuels and compression. Typically installation will result in 8.8:1 compression (the original "S was 9.75:1 and would never last without special efforts). Current pistons differ from the 60s originals, improved with a "low drag" slipper skirt design and a shorter lighter wrist pin. Wrist pin height is 1.4689", top is dished 8.4cc, and they have a 4mm oil ring and two 1.5mm compression rings.  Set of 4 pistons complete with rings and pins.
If you are running today's regular unleaded gas you must pay attention to compression. These new AE pistons are designed for modern fuels and compression. Typically, installation will result in 8.8:1 compression (the original "S was 9.75:1 and would never last without special efforts). Current pistons differ from the 60s originals, improved with a "low drag" slipper skirt design and a shorter lighter wrist pin. Wrist pin height is 1.4689", top is dished 8.4cc, and they have a 4mm oil ring and two 1.5mm compression rings.
If you are running todays regular unleaded gas you must pay attention to compression. These new design AE pistons are designed for modern fuels and compression. Typically installation will result in 8.8:1 compression (the original "S was 9.75:1 and would never last without special efforts). Current pistons differ from the 60s originals, improved with a "low drag" slipper skirt design and a shorter lighter wrist pin. Wrist pin height is 1.4689", top is dished 8.4cc, and they have a 4mm oil ring and two 1.5mm compression rings.
Standard size sold as a set of four. Oversized pistons (part numbers ending in "EA") are sold individually.
If you are running todays regular unleaded gas you must pay attention to compression. These new design AE pistons are designed for modern fuels and compression. Typically installation will result in 8.8:1 compression (the original "S was 9.75:1 and would never last without special efforts). Current pistons differ from the 60s originals, improved with a "low drag" slipper skirt design and a shorter lighter wrist pin. Wrist pin height is 1.4689", top is dished 8.4cc, and they have a 4mm oil ring and two 1.5mm compression rings.  Set of 4 pistons complete with rings and pins.
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Related Technical Articles:
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The following chart shows the SAE recommended Automotive compression ring end gaps. These recommendations are followed for the majority of the ring line unless a certain application requires deviation from the chart.