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NRW Design - S65 Billet Spark Plug Tubes - BMW E9X M3
NRW Design Billet Spark Plug Tubes with Viton Gasket Set! Made from 6061 billet aluminum, these are the first ever serviceable spark plug tubes on the market. Giving 30% more contact surface than the OEM spark plug tube. NRW billet spark plug tubes will last a lifetime and will not leak, tear, or deteriorate over time.
