This is a set of .020 oversize piston rings for a 4.8 or 5.3 LS engine by Mahle (#41859CP.020). Axial Height UCR-1.5mm, LCR-1.5mm, OCR-3.0mm Facing UCR-Plasma-Moly; OCR-Chrome Material UCR-Carbon Steel; LCR-Carbon Steel; OCR-Stainless Steel Material Grade Premium R7 Shallow Groove Ring Type UCR:RF-13PF; LCR:THM-13; OCR: CP-20 Size Standard
