RLP Spark Plug Wire Set for GM LS3/LS4/LS7 — Extreme 9000 Ceramic Boots, 8.0mm Silicone

RLP's Extreme 9000 spark plug wire set (Accel 9070C compatible) is a high-temperature, low-resistance ignition wire kit built to deliver reliable spark delivery for GM Gen IV LS3/LS4/LS7 engines.

If you own a GM vehicle with a Gen IV LS engine and need a durable replacement wiring option, this RLP kit offers ceramic spark plug boots, ferro-spiral low-resistance cores, and stainless-steel plug terminals engineered for high-heat compartments and strong RFI/EMI suppression. It’s a direct-fit replacement for Accel part 9070C and covers many Cadillac, Chevy, and GMC models from the mid-2000s.

How does this wire set handle extreme engine heat?

The RLP Extreme 9000 wires use ceramic spark plug boots that tolerate very high temperatures where silicone alone would fail. Combined with double-layer 8.0mm silicone jackets and stainless-steel terminals, the assembly resists heat and abrasion to extend service life in harsh under-hood environments.

• Ceramic boots rated to 2,000°F at the tip for thermal protection
• 8.0mm double silicone construction rated to 600°F overall
• Stainless-steel spark plug terminals for corrosion and heat resistance

Will these wires improve ignition performance or reduce interference?

These wires prioritize consistent spark delivery and RFI/EMI suppression instead of promising horsepower gains. The ferro-spiral core has low resistance (about 500 ohms per foot), which helps maintain strong spark energy while minimizing radio-frequency noise that can affect electronics and sensors.

• Low-resistance ferro-spiral core (≈500 Ω/ft) for reliable spark energy
• Designed to reduce electromagnetic interference with modern vehicle electronics
• Stainless terminals maintain conductivity over time

Which vehicles and engines are compatible with this set?

This kit is made as a direct-fit replacement for GM Gen IV V8 engines (LS3/LS4/LS7 family) and references Accel part 9070C. It fits many model years of Cadillac, Chevy and GMC vehicles from roughly 2005–2008 when ordered in the correct cylinder-count and routing configuration.

• Fits LS3, LS4, and LS7 Gen IV GM V8 engines
• Common fits: Corvette, Silverado, Tahoe, Suburban, Escalade, Avalanche, Impala, Sierra, Yukon, Envoy, Express, SSR
• Replace Accel 9070C with this RLP compatible kit for direct installation

What warranty and troubleshooting support come with the wires?

RLP backs this spark plug wire set with a 12-month warranty to cover manufacturing defects or premature failure. If you see misfires, hard starts, rough idle, hesitation or poor fuel economy after installation, the warranty and troubleshooting guidance can help determine whether wires are the root cause.

• 12-month warranty for replacement or refund
• Contact RLP support for diagnostic guidance or warranty claims
• Recommended when symptoms include misfires or electrical interference

Who is this for? If you maintain or restore mid-2000s GM vehicles equipped with Gen IV LS engines and need a rugged, heat-resistant replacement for worn or damaged ignition wires, the RLP Extreme 9000 (Accel 9070C compatible) kit is built for that purpose. It’s aimed at mechanics, DIY enthusiasts, and performance-minded owners who want a direct-fit, durable wire set with strong RFI/EMI suppression, ceramic boot protection for extreme heat locations, and the reassurance of a one-year warranty.