RLP Spark Plug Wire Set for GM LS3 LS4 LS7 — 9070C Extreme 9000 Ceramic Boots, High-Heat Low-Resistance

RLP Extreme 9000 spark plug wire set (9070C) is a high-heat, low-resistance ignition wire kit with ceramic boots built to fit GM Gen IV LS3/LS4/LS7 engines.

These wires are engineered for performance engines and high-temperature compartments where standard wire sets degrade. The Extreme 9000 series pairs a ferro-spiral low-resistance core with stainless-steel terminals and ceramic spark plug boots, delivering consistent spark energy while suppressing radio-frequency interference. Designed as a direct-fit replacement for many Cadillac, Chevrolet and GMC models using LS-family engines, this kit restores ignition reliability without modifying existing ignition components.

How do these RLP wires perform in hot engine bays?

RLP designed the Extreme 9000 with materials chosen specifically to tolerate prolonged exposure to extreme heat. Ceramic boot ends resist temperatures up to 2,000°F while the double-layer silicone jacket is rated for continuous heat up to 600°F, helping prevent premature cracking or electrical leakage. The construction keeps electrical integrity even near headers and turbochargers.

• Ceramic boots withstand up to 2,000°F for heat-prone areas
• 8.0 mm double silicone jacket rated to 600°F for durability
• Stainless-steel terminals resist corrosion in hot, humid conditions

Will these wires reduce interference and misfires?

The ferro-spiral core provides low resistance (approximately 500 ohms per foot) while offering strong RFI/EMI suppression to protect on-board electronics and radios. Stainless-steel plug terminals and a snug ceramic boot seat promote reliable contact, reducing the chance of arcing and misfires common with aged or damaged wiring. If you have symptoms like rough idle, hesitation, or hard starts, replacing the wire set is often an effective fix.

• Low-resistance ferro-spiral core for improved spark transfer
• High RFI/EMI suppression to protect electronics and radios
• Ceramic boots and stainless terminals reduce arcing and misfires

Which vehicles and engines does the 9070C fit?

This RLP kit is made to replace part number 9070C and fits GM Gen IV LS engines that use LS-style coil pack and terminal layouts. It is compatible with a wide range of Cadillac, Chevy and GMC models from mid-2000s model years—particularly those equipped with LS3, LS4 or LS7 platforms. Always cross-check engine designation and terminal type before purchase to confirm fitment.

• Designed for GM Gen IV LS3 / LS4 / LS7 engines (coil pack terminal style)
• Direct-fit for many 2005–2008 Cadillac, Chevy, GMC models listed in product specs
• Replaces OEM part number 9070C for exact compatibility

What kind of warranty and longevity should I expect?

RLP backs this spark plug wire set with a 12-month warranty covering defects and premature failure. The robust combination of ceramic boots, stainless terminals and a heat-rated silicone jacket is intended to extend service life versus generic wire sets, especially in performance or high-heat installations. Routine inspection during maintenance intervals can help you get the most life from the wires and detect issues early.

• 12-month warranty for replacement or refund on failures
• Materials chosen for extended service life in demanding conditions
• Inspect boots and terminals periodically for wear or damage

Who is this for? The RLP Extreme 9000 9070C wire set is aimed at owners and technicians working on GM vehicles with Gen IV LS engines who need a durable, high-temperature ignition solution. It's a good match for performance builds, daily drivers with aging wiring, and anyone experiencing ignition-related drivability issues. If you want a direct-fit replacement with strong heat tolerance and interference suppression for LS3/LS4/LS7 setups, this kit is designed to meet those needs.