Sierra 18-28019 Marine Spark Plug Wire Set for 383/400/440 Engines

The Sierra 18-28019 is a marine-grade spark plug wire set engineered to meet or exceed OEM specifications for use with 383, 400, and 440 cubic inch marine engines. Compatible with both electronic and conventional ignition types, this replacement wire set delivers reliable ignition performance in demanding on-water environments.

Sierra's marine spark plug wire sets are built to withstand the heat, vibration, moisture, and corrosion unique to marine applications. The wires feature a high-tear-strength silicone jacket rated to protect against extreme heat, while an aramid inner core maintains conductor integrity under stress. Stainless steel terminals resist corrosion and provide secure, low-resistance connections at both the plug and distributor ends.

Key Features:

• Engineered to meet or exceed OEM specifications
• Compatible with electronic and conventional ignition systems
• Designed for 383, 400, and 440 cubic inch marine engine applications
• High-tear-strength silicone jacket for heat and moisture protection
• Aramid inner core for conductor integrity and durability
• Stainless steel terminals resist corrosion for reliable conductivity
• RFI/EMI suppression helps protect onboard electronics including GPS and VHF radios
• Direct OEM replacement fit — no modification required

Sierra International is a leading supplier of premium aftermarket marine parts, offering replacements for over 6,000 marine components. The 18-28019 spark plug wire set is a dependable ignition upgrade or replacement that helps restore engine efficiency and performance.