HONDA Valve Stem Seals. This is a complete set of 16 valve stem seals for most Honda engines. As with all genuine Honda parts expect a perfect fit and performance. You will receive 8x 12210-PZ1-004 and 8x 12211-PZ1-004. These will fit all B-series, D-series, K-series, H-series and F-series engines (B16, B18, K20, D16, H22, F20 etc).