6x Pistons Rings KS STD Low Compression 9.7:1 For BMW E60 E90 325i 523i N52B25
Fit N52B25 2.5L L6 (2497cc) Naturally aspirated engine. BMW N52B25 Compression ratio 9.7:1. 323i 325i 523i 525i 2.5L L6 Naturally aspirated. 523i 2005-2011 E60 E61 F10 F11. 6x Pistons Rings Set Φ82mm For BMW E81 E87 E83 E84 E90 E91 E92 E93 E60 E61.