RLP Silicone Spark Plug Wire Set 8.0mm Black — 8-Wire SBC HEI Replacement with Spiral-Core for Chevy/GMC

RLP 8.0mm silicone spark plug wire set is a direct-fit replacement kit designed to deliver stable high-voltage transfer and strong EMI/RFI suppression for Chevy and GMC small-block SBC engines with a GM-style HEI distributor.

These eight high-tension leads are built with a spiral-core conductor wrapped in a heavy-duty 8.0mm silicone jacket to resist heat, oil, and chemicals while routing over valve covers. The set is intended for coil-in-cap HEI distributors with male terminal caps and does not include a coil wire or fit points-style distributors. Backed by a 12-month warranty, the wires are manufactured to meet strict quality standards for dependable performance during everyday driving and higher-load situations.

How do these wires improve ignition stability under heat and load?

The combination of a spiral conductor and thick silicone jacket helps maintain low resistance and suppress electromagnetic interference so the ignition spark stays consistent at higher temperatures. Durable boots and quality terminals preserve connection integrity when the engine is hot.

• Spiral-core conductor for stable, low-resistance spark delivery
• 8.0mm silicone jacket protects against high heat and oils
• Silicone distributor and plug boots reduce leakage and arcing
• Stainless steel/brass terminals for reliable conductivity

Will this set fit my Chevy or GMC small-block engine?

Yes, the wires are matched to common SBC displacement numbers and designed to fit engines that use a GM-style HEI distributor with a male terminal cap. They are routed over valve covers and sold as an eight-wire set (coil wire not included).

• Compatible with SBC 265, 267, 283, 302, 305, 307, 327, 350, 400
• Engineered for coil-in-cap HEI distributors (male terminal cap)
• Not compatible with points-style distributors
• Pre-formed 90° boots for plug and distributor ends where specified

What installation details and routing should I expect?

These wires are intended to be routed over the valve covers and use 90° boots at both the spark plug and distributor to simplify installation in confined engine bays. Follow firing order and wire lengths to avoid cross-firing and excessive bends.

• Over-valve-cover routing minimizes contact with headers and hot components
• 90° boots reduce strain at connection points and ease placement
• Check individual wire lengths and firing order before final seating
• Secure with proper separators to prevent chafing and electrical leakage

What quality assurances and exclusions should I know?

RLP supplies these wires new and packaged to quality standards, and the kit comes with a 12-month replacement warranty. The product excludes the coil wire and will not fit older, points-type distributors, so verify your distributor style before ordering.

• Comes as an 8-wire set (no coil wire included)
• 12-month warranty for replacement on manufacturing defects
• Built to strict quality control standards and thoroughly packed
• Not suitable for points-style distributor systems

Who is this for: Mechanics, restorers and DIY enthusiasts working on Chevy or GMC small-block SBC engines who need a dependable, heat-resistant ignition wire set that fits GM-style HEI distributors. Choose this RLP kit if you want durable silicone boots, strong EMI/RFI suppression, and a direct over-valve-cover routing configuration for classic small-block applications.