New in the box Keith Black Hypereutectic 340 pistons KB243+.020 4.060 bore 1.84 ch +6cc valve reliefs +.018 deck .984 press-fit or floating pins. 5/64 5/64 3/16 ring use Summit retail: $467 Buy these for $389. PayPal FF or postal money order. Free shipping. PM me here please. Sorry for the upside down pics - they look correct in my files.