Sierra 18-8836-1 MAGFORCE Spark Plug Wire Set for Delco HEI/EST Ignitions, 5.0L/5.7L/7.4L V8

The Sierra 18-8836-1 is a MAGFORCE spark plug wire set built for marine V8 engines running Delco HEI and Delco EST ignitions. The set is engineered to be "electronics friendly," using a mag/wire wound core construction that delivers maximum voltage to the plugs while blocking radio frequency interference (RFI) and electromagnetic interference (EMI) that can disrupt onboard electronic engine controls. Moisture-proof, molded distributor insulators keep the connection sealed against the marine environment, while a high-quality conductive center carrier reinforcement maintains conductor integrity over time. A high-tensile-strength membrane adds durability and heat resistance, and an innovative nylon reinforcing tape further protects the wire jacket. Terminals at both the spark plug and distributor ends are corrosion-resistant stainless steel for reliable conductivity. The set is finished in white and includes spark plug wires in four lengths plus a coil wire, sized to route cleanly through the engine bay. It is designed as an exact-fit replacement for easy installation and long-term, trouble-free service on 5.0L, 5.7L, and 7.4L V8 marine engines using Delco HEI or Delco EST ignition systems.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8836-1
• Product Line: MAGFORCE Ignition Wires
• Ignition Compatibility: Delco HEI, Delco EST
• Spark Plug Wire Lengths: one 29 inch, three 33 inch, two 39 inch, two 45 inch
• Coil Wire Length: one 16 inch
• Wire Diameter: 7 millimeters
• Material: Stainless Steel
• Terminal Type: Spark Plug Terminal, Distributor Terminal (stainless steel, corrosion resistant)
• Color: White
• Item Dimensions: 10.25 x 7.25 x 2.75 inches
• Weight: 1.93 pounds

Fitment

• 5.0L 8-cylinder YEMS engines (1989)
• 5.7L 8-cylinder Delco EST engines (1989-1990)
• 7.4L 8-cylinder Delco EST engines (1992)

Replaces (OEM)

No OEM cross-reference numbers are listed for this part.

Frequently Asked Questions

What engines does the Sierra 18-8836-1 spark plug wire set fit? The Sierra 18-8836-1 fits 5.0L 8-cylinder YEMS engines (1989), 5.7L 8-cylinder Delco EST engines (1989-1990), and 7.4L 8-cylinder Delco EST engines (1992).

Does the 18-8836-1 work with Delco HEI ignitions? Yes, the Sierra 18-8836-1 MAGFORCE wire set is designed specifically for Delco HEI ignitions, as well as Delco EST systems on the covered engines.

What lengths are the spark plug wires in this set? The set includes one 29 inch wire, three 33 inch wires, two 39 inch wires, and two 45 inch wires, plus a 16 inch coil wire, all as part of Sierra part number 18-8836-1.

What is MAGFORCE technology and why does it matter? MAGFORCE is Sierra's ignition wire construction that uses a mag/wire wound core to deliver maximum voltage while blocking RFI and EMI, protecting electronic engine controls and other onboard electronics from interference.

What material are the terminals made of on the 18-8836-1 wire set? The spark plug and distributor terminals on the Sierra 18-8836-1 are corrosion-resistant stainless steel for reliable conductivity in the marine environment.

How much does the 18-8836-1 wire set weigh? The Sierra 18-8836-1 spark plug wire set weighs 1.93 pounds.

What color are these ignition wires? The Sierra 18-8836-1 MAGFORCE wire set is white.

What are the packaged dimensions of the 18-8836-1 wire set? The Sierra 18-8836-1 measures 10.25 x 7.25 x 2.75 inches as packaged.

Is the 18-8836-1 a complete wire set? Yes, one 18-8836-1 set includes the full run of spark plug wires (in four lengths) and a coil wire needed for the covered Delco HEI/EST V8 engines.

What is the wire diameter on the 18-8836-1 set? The Sierra 18-8836-1 uses 7 millimeter diameter wire.

Are the distributor insulators protected against moisture? Yes, the Sierra 18-8836-1 uses moisture-proof, molded distributor insulators to seal out the marine environment.

How is the 18-8836-1 built to resist heat and wear? The Sierra 18-8836-1 uses a high-quality conductive center carrier reinforcement, a high-tensile-strength membrane for heat resistance, and nylon reinforcing tape for added durability.