This listing is for Connecting Rod Bolts Set of 16 compatible replacements for 2007-15 Chevy GM 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LS3 LS6 L99 engines. These are purchased from the same vendor that supplies GM. They replace OE # 11570662. These are the 2nd design with retaining sleeve ring.