KB928C040 Performance, 3-5/8 big bore forged piston kit. +.040"

For 1948–1984 Panhead and Shovelhead owners running 3-5/8" big bore cylinders, this KB Performance forged piston kit offers a high-strength solution for a +.040" oversize bore. Forged from 4032 aluminum alloy, these pistons are built to handle the increased loads of a big bore or stroker motor, providing excellent resistance to cracking and detonation. Depending on your stroke and cylinder length, you can achieve compression ratios ranging from 8.5:1 up to 9.38:1. Sold as a set, the kit comes with rings and offset wrist pins. Because the wrist pins are offset, the pistons must be installed in the correct front-to-rear orientation as specified in the included instructions.