CNPAPC Iridium Spark Plug & Wire Kit for Chevy V8 — 8 Plugs 9 Wires, Long-Life Iridium High-Temp Silicone

The CNPAPC kit combines eight fine-wire iridium spark plugs with nine high‑temperature spark plug wires to restore reliable ignition for classic Chevy V8 engines.

This complete ignition set is built to fit a wide range of small‑block and big‑block Chevrolet V8s plus many compatible GM models from the 1970s and 1980s. The kit bundles long‑life iridium plugs with reinforced silicone wires to deliver consistent spark, improved cold starts, and durable resistance to heat and moisture. OEM part numbers are listed so you can verify compatibility before ordering.

Which engines and vehicles will this kit fit?

This bundle was engineered for Chevy small‑block and big‑block gasoline engines and many period GM cars and trucks. Always cross‑check with your engine displacement, year, and OEM part numbers to confirm fitment.

• Fits Chevy SBC models: 262, 265, 283, 302, 305, 307, 327, 350, 383, 400 cu in.
• Fits Chevy BBC models: 366, 396, 402, 427, 454, 502 cu in.
• Examples of compatible vehicles: Buick Century (1977–1981), Lesabre (1978–1982), Checker Marathon (1975–1978), Chevy C20 Suburban (1975–1986), P30 (1975–1976), Pontiac Sunbird (1978–1979).
• OEM references: 93440806, SP425 — verify with VIN or photos before purchase.

How do the iridium plugs and wires improve engine performance?

The iridium plugs use a fine central electrode that requires less voltage to ionize the air‑fuel mixture, providing a stronger, more consistent spark. Paired with dual‑jacketed silicone wires, the system helps maintain ignition energy and reduces misfires under demanding conditions.

• Fine‑wire iridium electrode improves ignitability and can extend service life.
• Dual high‑temperature silicone jacket with fiberglass reinforcement resists wear and moisture.
• Better spark delivery supports smoother starts and steadier idle when installed correctly.

Is installation difficult and what tools are required?

The kit is designed for a direct, bolt‑on replacement with no special programming or modifications. Basic hand tools and a torque wrench for the spark plugs are typically all you need; refer to vehicle service specs for correct torque values.

• Direct‑fit components engineered to match factory routing and connector types.
• No ECU reprogramming required for standard gasoline engines.
• Recommended tools: socket set, spark plug socket, torque wrench, dielectric grease for terminals.

What durability and warranty can I expect?

The plugs and wires are built for extended service life under normal operating conditions and undergo testing before shipment. CNPAPC backs the kit with a 12‑month warranty to protect against manufacturing defects.

• Iridium plugs rated for long mileage life (typical service life noted by manufacturer under normal conditions).
• Wires feature high‑temp and corrosion resistance for reliable performance in hot engine bays.
• Each kit is tested prior to shipping and includes a 12‑month limited warranty.

Who is this for: This ignition kit is aimed at owners and restorers of classic GM V8s who want a complete, OEM‑referenced replacement set—mechanically inclined DIYers, restoration shops, and professional technicians servicing 1970s–1980s Chevy, Buick, Pontiac, and related models. Confirm fitment with your engine displacement, year, or the listed OEM part numbers before installing to ensure correct application.