These pistons replace the original Hepolite pistons 18516KR and P20950 used on the original Coopers.

From Russell Engineering in Australia, these 998cc pistons are +.080 oversized, or 2.622" (66.60mm). These are high quality, three ring, flat top pistons. They come complete with pins and rings. Pin-height (distance from top of piston to center of wrist pin) is 1.333".

998 Flat-top Piston Set. This modern piston are flat top with oil holes rather than slots behind the rings and are suitable for up to 12:1 compression. The flat top design will yield a compression of about 9.6:1 when used with a Cooper cylinder head.

This pistons replaces the original Hepolite pistons 18516KR and P20950 used on the original Coopers.

From Russell Engineering in Australia, these 998cc pistons are +.040 oversized, or 2.582" (65.58mm). These are high quality, three ring, flat top pistons. They come complete with pins and rings. Pin-height (distance from top of piston to center of wrist pin) is 1.333".

998 Flat-top Piston Set. This modern piston are flat top with oil holes rather than slots behind the rings and are suitable for up to 12:1 compression. The flat top design will yield a compression of about 9.6:1 when used with a Cooper cylinder head.

This pistons replaces the original Hepolite pistons 18516KR and P20950 used on the original Coopers.

From Russell Engineering in Australia, these 998cc pistons are +.060 oversized, or 2.602" (66.10mm). These are high quality, three ring, flat top pistons. They come complete with pins and rings. Pin-height (distance from top of piston to center of wrist pin) is 1.333".

This pistons replaces the original Hepolite pistons 18516KR and P20950 used on the original Coopers.

From Russell Engineering in Australia, these 998cc pistons are +.020 oversized, or 2.562" (65.08mm). These are high quality, three ring, flat top pistons. They come complete with pins and rings. Pin-height (distance from top of piston to center of wrist pin) is 1.333".