Sierra 18-8838-1 Spark Plug Wire Set for Indmar Inboards & Mercruiser DrivesSierra replacement spark plug wire set for Mercruiser Stern Drives and Indmar Inboards.Specifications: Ignition Type: Distributorless; 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: (4) Spark plug wires 24"; (4) Spark plug wires 32"; Interchangeable with: CDI; 631-0020; Indmar; 751202; Mallory; 9-28031; Mercury Marine; 84-88169;