Sierra 18-8824-1 Spark Plug Wire Set for Indmar and Mercruiser EnginesSierra spark plug wire set for Indmar Inboards and Mercruiser engines.Specifications: Ignition Type: XL Series; Model: 454/7.4L, 502/8.2L; Cyl.: 8; Spark Plug Wire Features: Kevlar core for maximum durability and long life; Durable stainless steel wound conductor for maximum horsepower and engine performance; Premium silicone jacketing and boots for the ultimate in high temperature protection; Superior RFI suppression for the most sensitive electronic system; Corrosion resistant stainless steel spark plug and distributor terminals for maximum conductivity; Wire Lengths: (3) Spark Plug Wires 32"; (2) Spark Plug Wires 37.5"; (2) Spark Plug Wires 43"; (1) Spark Plug Wire 46"; (1) Coil Wire 14"; Interchangeable with: Mercury Marine; 84-816608Q78;