BMW S52 (US) 86.6mm Custom Wisco Forged Pistons with 137mm H Beam Rods. This is a set of custom (used) wisco forged used pistons for the S52 engine (89.6mm stroke). These pistons have a compression height of 26.5mm. With a 137mm rod the compression is 10.5:1. One valve made contact (see pictures) and there is some minor damage through out (used). Included are a set of (new) 137mm H beam rods with 9mm arp bolts from a Honda B18. The rod lock tang has been machined for a bmw bearing. The pistons come with wrist pins, and oil support rails. New clips for the wrist pins are provided. You’ll need to purchase new rings. Hasting number 2C 5094 +.040 or 2M 5094 +.040. Feel free to ask any questions. -Teddy Rowe