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The NGK spark plug wire set for BMW 635CSi (1988–1989) provides OE-level tinned copper core or mag-core options with premium insulation for reliable ignition performance. A high-temp silicone outer jacket and EPDM/silicone inner insulation give dielectric strength while stainless winding reduces resistance and suppresses EMI/RFI where specified. Spark plug boots are glued with silicone sealer for moisture protection; terminals employ serrated crimps and a locking clip. Kit includes 6 wires with a coil lead and a limited lifetime warranty.
NGK BMW 635CSi 1989-1988 Spark Plug Wire Set
