Sierra 18-8821-1 MerCruiser Thunderbolt V8 Gen+ Spark Plug Wire SetSierra replacement engine parts are designed to meet or exceed OEM requirements. This spark wire set is used on MerCruiser engines.Features: Kit includes coil wire.; 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: 2 Spark Plug Wires 29"; 2 Spark Plug Wires 34"; 2 Spark Plug Wires 38"; 2 Spark Plug Wires 44"; 1 Coil Wire 12"; Interchangeable with: MerCruiser Stern Drive; 84-813720A3; 84-813720A4; 84-816761A17; 84-816761A4; 84-816761Q17; 84-816761Q3; 84-816761Q4; Application: 200 2BBL. GM 1987-1995; 230 4 BBL. GM 1987-1995; 260 4 BBL. GM 1987-1995; 260 GM 1987-1995; 350 MAG ALPHA 4 BBL GM 1996-1997; 350 MAG ALPHA GM 1987-1995; 350 MAG SKI GM 1995; 350 MAG SKI GM 1992-1996; 350 MAG SKI GM 350 V-8 1997; 357 ALPHA 4V 2008-2009; 357 MAG BRAVO 4V 2008-2009; 383 MAG BRAVO 4V 2008-2009; 5.0L 2 BBL GM 1987-1998; 5.0LX 4 BBL GM 1987-1995; 5.7L 2 BBL GM 1996-1998; 5.7 COMPETITION SKI GM 1997; 5.7L GM 1987-1995; 5.7L MIE GM 1994;